Efficacy and safety of OBI-1, an antihaemophilic factor VIII (recombinant), porcine sequence, in subjects with acquired haemophilia A

Summary Acquired haemophilia A (AHA) is a rare bleeding disorder caused by autoantibodies against human factor VIII (hFVIII). OBI‐1 is an investigational, B‐domain deleted, recombinant FVIII, porcine sequence, with low cross‐reactivity to anti‐hFVIII antibodies. Efficacy can be monitored with FVIII...

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Published inHaemophilia : the official journal of the World Federation of Hemophilia Vol. 21; no. 2; pp. 162 - 170
Main Authors Kruse-Jarres, R., St-Louis, J., Greist, A., Shapiro, A., Smith, H., Chowdary, P., Drebes, A., Gomperts, E., Bourgeois, C., Mo, M., Novack, A., Farin, H., Ewenstein, B.
Format Journal Article
LanguageEnglish
Published England Blackwell Publishing Ltd 01.03.2015
Wiley Subscription Services, Inc
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Abstract Summary Acquired haemophilia A (AHA) is a rare bleeding disorder caused by autoantibodies against human factor VIII (hFVIII). OBI‐1 is an investigational, B‐domain deleted, recombinant FVIII, porcine sequence, with low cross‐reactivity to anti‐hFVIII antibodies. Efficacy can be monitored with FVIII activity levels in addition to clinical assessments. This prospective, open label, phase 2/3 study was designed to evaluate the efficacy of OBI‐1 treatment for bleeding episodes in subjects with AHA. After an initial dose of 200 U kg−1, OBI‐1 was titrated to maintain target FVIII activity levels, in correlation with clinical assessments, throughout the treatment phase. All 28 subjects with AHA had a positive response to OBI‐1 treatment 24 h after initiation despite inhibition of FVIII activity levels immediately after infusion in 10 subjects with baseline anti‐porcine FVIII inhibitors. Control of the qualifying bleed was ultimately achieved in 24 of 28 subjects. No related serious adverse events, thrombotic events, allergic reactions or thrombocytopaenia occurred. The results of this study indicate that OBI‐1 is safe and effective in treating bleeding episodes in subjects with AHA. The ability to safely and effectively titrate dosing based on FVIII activity levels in this study demonstrates that OBI‐1 fulfils the unmet medical need to monitor the key coagulation parameter in AHA patients.
AbstractList Summary Acquired haemophilia A (AHA) is a rare bleeding disorder caused by autoantibodies against human factor VIII (hFVIII). OBI‐1 is an investigational, B‐domain deleted, recombinant FVIII, porcine sequence, with low cross‐reactivity to anti‐hFVIII antibodies. Efficacy can be monitored with FVIII activity levels in addition to clinical assessments. This prospective, open label, phase 2/3 study was designed to evaluate the efficacy of OBI‐1 treatment for bleeding episodes in subjects with AHA. After an initial dose of 200 U kg−1, OBI‐1 was titrated to maintain target FVIII activity levels, in correlation with clinical assessments, throughout the treatment phase. All 28 subjects with AHA had a positive response to OBI‐1 treatment 24 h after initiation despite inhibition of FVIII activity levels immediately after infusion in 10 subjects with baseline anti‐porcine FVIII inhibitors. Control of the qualifying bleed was ultimately achieved in 24 of 28 subjects. No related serious adverse events, thrombotic events, allergic reactions or thrombocytopaenia occurred. The results of this study indicate that OBI‐1 is safe and effective in treating bleeding episodes in subjects with AHA. The ability to safely and effectively titrate dosing based on FVIII activity levels in this study demonstrates that OBI‐1 fulfils the unmet medical need to monitor the key coagulation parameter in AHA patients.
Acquired haemophilia A (AHA) is a rare bleeding disorder caused by autoantibodies against human factor VIII (hFVIII). OBI-1 is an investigational, B-domain deleted, recombinant FVIII, porcine sequence, with low cross-reactivity to anti-hFVIII antibodies. Efficacy can be monitored with FVIII activity levels in addition to clinical assessments. This prospective, open label, phase 2/3 study was designed to evaluate the efficacy of OBI-1 treatment for bleeding episodes in subjects with AHA. After an initial dose of 200 U kg(-1) , OBI-1 was titrated to maintain target FVIII activity levels, in correlation with clinical assessments, throughout the treatment phase. All 28 subjects with AHA had a positive response to OBI-1 treatment 24 h after initiation despite inhibition of FVIII activity levels immediately after infusion in 10 subjects with baseline anti-porcine FVIII inhibitors. Control of the qualifying bleed was ultimately achieved in 24 of 28 subjects. No related serious adverse events, thrombotic events, allergic reactions or thrombocytopaenia occurred. The results of this study indicate that OBI-1 is safe and effective in treating bleeding episodes in subjects with AHA. The ability to safely and effectively titrate dosing based on FVIII activity levels in this study demonstrates that OBI-1 fulfils the unmet medical need to monitor the key coagulation parameter in AHA patients.
Acquired haemophilia A ( AHA ) is a rare bleeding disorder caused by autoantibodies against human factor VIII ( hFVIII ). OBI ‐1 is an investigational, B‐domain deleted, recombinant FVIII , porcine sequence, with low cross‐reactivity to anti‐ hFVIII antibodies. Efficacy can be monitored with FVIII activity levels in addition to clinical assessments. This prospective, open label, phase 2/3 study was designed to evaluate the efficacy of OBI ‐1 treatment for bleeding episodes in subjects with AHA . After an initial dose of 200 U kg −1 , OBI ‐1 was titrated to maintain target FVIII activity levels, in correlation with clinical assessments, throughout the treatment phase. All 28 subjects with AHA had a positive response to OBI ‐1 treatment 24 h after initiation despite inhibition of FVIII activity levels immediately after infusion in 10 subjects with baseline anti‐porcine FVIII inhibitors. Control of the qualifying bleed was ultimately achieved in 24 of 28 subjects. No related serious adverse events, thrombotic events, allergic reactions or thrombocytopaenia occurred. The results of this study indicate that OBI ‐1 is safe and effective in treating bleeding episodes in subjects with AHA . The ability to safely and effectively titrate dosing based on FVIII activity levels in this study demonstrates that OBI ‐1 fulfils the unmet medical need to monitor the key coagulation parameter in AHA patients.
Acquired haemophilia A (AHA) is a rare bleeding disorder caused by autoantibodies against human factor VIII (hFVIII). OBI‐1 is an investigational, B‐domain deleted, recombinant FVIII, porcine sequence, with low cross‐reactivity to anti‐hFVIII antibodies. Efficacy can be monitored with FVIII activity levels in addition to clinical assessments. This prospective, open label, phase 2/3 study was designed to evaluate the efficacy of OBI‐1 treatment for bleeding episodes in subjects with AHA. After an initial dose of 200 U kg−1, OBI‐1 was titrated to maintain target FVIII activity levels, in correlation with clinical assessments, throughout the treatment phase. All 28 subjects with AHA had a positive response to OBI‐1 treatment 24 h after initiation despite inhibition of FVIII activity levels immediately after infusion in 10 subjects with baseline anti‐porcine FVIII inhibitors. Control of the qualifying bleed was ultimately achieved in 24 of 28 subjects. No related serious adverse events, thrombotic events, allergic reactions or thrombocytopaenia occurred. The results of this study indicate that OBI‐1 is safe and effective in treating bleeding episodes in subjects with AHA. The ability to safely and effectively titrate dosing based on FVIII activity levels in this study demonstrates that OBI‐1 fulfils the unmet medical need to monitor the key coagulation parameter in AHA patients.
Acquired haemophilia A (AHA) is a rare bleeding disorder caused by autoantibodies against human factor VIII (hFVIII). OBI-1 is an investigational, B-domain deleted, recombinant FVIII, porcine sequence, with low cross-reactivity to anti-hFVIII antibodies. Efficacy can be monitored with FVIII activity levels in addition to clinical assessments. This prospective, open label, phase 2/3 study was designed to evaluate the efficacy of OBI-1 treatment for bleeding episodes in subjects with AHA. After an initial dose of 200 U kg(-1) , OBI-1 was titrated to maintain target FVIII activity levels, in correlation with clinical assessments, throughout the treatment phase. All 28 subjects with AHA had a positive response to OBI-1 treatment 24 h after initiation despite inhibition of FVIII activity levels immediately after infusion in 10 subjects with baseline anti-porcine FVIII inhibitors. Control of the qualifying bleed was ultimately achieved in 24 of 28 subjects. No related serious adverse events, thrombotic events, allergic reactions or thrombocytopaenia occurred. The results of this study indicate that OBI-1 is safe and effective in treating bleeding episodes in subjects with AHA. The ability to safely and effectively titrate dosing based on FVIII activity levels in this study demonstrates that OBI-1 fulfils the unmet medical need to monitor the key coagulation parameter in AHA patients.Acquired haemophilia A (AHA) is a rare bleeding disorder caused by autoantibodies against human factor VIII (hFVIII). OBI-1 is an investigational, B-domain deleted, recombinant FVIII, porcine sequence, with low cross-reactivity to anti-hFVIII antibodies. Efficacy can be monitored with FVIII activity levels in addition to clinical assessments. This prospective, open label, phase 2/3 study was designed to evaluate the efficacy of OBI-1 treatment for bleeding episodes in subjects with AHA. After an initial dose of 200 U kg(-1) , OBI-1 was titrated to maintain target FVIII activity levels, in correlation with clinical assessments, throughout the treatment phase. All 28 subjects with AHA had a positive response to OBI-1 treatment 24 h after initiation despite inhibition of FVIII activity levels immediately after infusion in 10 subjects with baseline anti-porcine FVIII inhibitors. Control of the qualifying bleed was ultimately achieved in 24 of 28 subjects. No related serious adverse events, thrombotic events, allergic reactions or thrombocytopaenia occurred. The results of this study indicate that OBI-1 is safe and effective in treating bleeding episodes in subjects with AHA. The ability to safely and effectively titrate dosing based on FVIII activity levels in this study demonstrates that OBI-1 fulfils the unmet medical need to monitor the key coagulation parameter in AHA patients.
Author Greist, A.
Bourgeois, C.
Mo, M.
Smith, H.
Chowdary, P.
Gomperts, E.
Farin, H.
Kruse-Jarres, R.
St-Louis, J.
Drebes, A.
Novack, A.
Shapiro, A.
Ewenstein, B.
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  organization: Division of Hematology, Hôpital Maisonneuve-Rosemont, University of Montreal, QC, Montreal, Canada
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  surname: Greist
  fullname: Greist, A.
  organization: Indiana Hemophilia and Thrombosis Center, IN, Indianapolis, USA
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  surname: Shapiro
  fullname: Shapiro, A.
  organization: Indiana Hemophilia and Thrombosis Center, IN, Indianapolis, USA
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  givenname: H.
  surname: Smith
  fullname: Smith, H.
  organization: Division of Hematology/Oncology, Tufts New England Medical Center, MA, Boston, USA
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  surname: Chowdary
  fullname: Chowdary, P.
  organization: Katharine Dormandy Haemophilia Centre and Thrombosis Unit, Royal Free Hospital, London, UK
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  givenname: A.
  surname: Drebes
  fullname: Drebes, A.
  organization: Katharine Dormandy Haemophilia Centre and Thrombosis Unit, Royal Free Hospital, London, UK
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  surname: Gomperts
  fullname: Gomperts, E.
  organization: Division of Hematology/Oncology, Children's Hospital of Los Angeles, CA, Los Angeles, USA
– sequence: 9
  givenname: C.
  surname: Bourgeois
  fullname: Bourgeois, C.
  organization: Baxter BioScience, Vienna, Austria
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  givenname: M.
  surname: Mo
  fullname: Mo, M.
  organization: Baxter Healthcare, CA, Westlake Village, USA
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  surname: Novack
  fullname: Novack, A.
  organization: Baxter Healthcare, CA, Westlake Village, USA
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  organization: Baxter Healthcare, CA, Westlake Village, USA
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  givenname: B.
  surname: Ewenstein
  fullname: Ewenstein, B.
  organization: Baxter Healthcare, CA, Westlake Village, USA
BackLink https://www.ncbi.nlm.nih.gov/pubmed/25623166$$D View this record in MEDLINE/PubMed
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2015 John Wiley & Sons Ltd.
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1365-2516
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Issue 2
Keywords acquired haemophilia A
bleeding episodes
recombinant FVIII porcine sequence
replacement therapy
Language English
License http://onlinelibrary.wiley.com/termsAndConditions#vor
2015 John Wiley & Sons Ltd.
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Notes Table S1. Efficacy assessment criteria. Table S2. Investigator assessment of control of bleeding by body system of anticipated sites of bleeding. Table S3. Exposure per subject within the first 24 hours (n = 28). Table S4. Dose reduction from initial dose and from the first 24- hour period to treat primary serious bleed in AHA patients. Table S5. Subject deaths. Figure S1. Subject enrolment and disposition
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PublicationTitle Haemophilia : the official journal of the World Federation of Hemophilia
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References Kempton CL, Abshire TC, Deveras RA et al. Pharmacokinetics and safety of OBI-1, a recombinant B domain-deleted porcine factor VIII, in subjects with haemophilia A. Haemophilia 2012; 18: 798-804.
Lloyd JV, Street AM, Berry E et al. Cross-reactivity to porcine factor VIII of factor VIII inhibitors in patients with haemophilia in Australia and New Zealand. Aust N Z J Med 1997; 27: 658-64.
Collins PW, Hirsch S, Baglin TP et al. Acquired hemophilia A in the United Kingdom: a 2-year national surveillance study by the United Kingdom Haemophilia Centre Doctors' Organisation. Blood 2007; 109: 1870-7.
Huth-Kühne A, Baudo F, Collins P et al. International recommendations on the diagnosis and treatment of patients with acquired hemophilia A. Haematologica 2009; 94: 566-75.
Brettler DB, Forsberg AD, Levine PH et al. The use of porcine factor VIII concentrate (Hyate:C) in the treatment of patients with inhibitor antibodies to factor VIII. A multicenter US experience. Arch Intern Med 1989; 149: 1381-5.
Cugno M, Gualtierotti R, Tedeschi A, Meroni PL. Autoantibodies to coagulation factors: from pathophysiology to diagnosis and therapy. Autoimmun Rev 2014; 13: 40-8.
Zeitler H, Goldmann G, Marquardt N, Ulrich-Merzenich G. Long term outcome of patients with acquired haemophilia - a monocentre interim analysis of 82 patients. Atheroscler Suppl 2013; 14: 223-8.
Cohen AJ, Kessler CM. Acquired inhibitors. Baillieres Clin Haematol 1996; 9: 331-54.
Hay CRM. Porcine factor VIII: current status and future developments. Haemophilia 2002; 8(Suppl 1): 24-7.
Morrison AE, Ludlam CA, Kessler C. Use of porcine factor VIII in the treatment of patients with acquired hemophilia. Blood 1993; 81: 1513-20.
Toschi V. OBI-1, porcine recombinant Factor VIII for the potential treatment of patients with congenital hemophilia A and alloantibodies against human Factor VIII. Curr Opin Mol Ther 2010; 12: 617-25.
Healey JF, Lubin IM, Lollar P. The cDNA and derived amino acid sequence of porcine factor VIII. Blood 1996; 88: 4209-14.
Giangrande PLF. Porcine factor VIII. Haemophilia 2012; 18: 305-9.
Hoffman M, Dargaud Y. Mechanisms and monitoring of bypassing agent therapy. J Thromb Haemost 2012; 10: 1478-85.
Collins PW, Chalmers E, Hart D et al. Diagnosis and management of acquired coagulation inhibitors: a guideline from UKHCDO. Br J Haematol 2013; 162: 758-73.
Baudo F, Collins P, Huth-Kuehne A et al. Management of bleeding in acquired hemophilia A (AHA): results from the European Acquired Hemophilia (EACH2) Registry. Blood 2012; 120: 39-46.
Lozier JN, Nghiem K, Lee M et al. Acquired haemophilia A after stem cell transplant for sickle cell disease: treatment with recombinant porcine factor VIII (OBI-1) and tolerance induction with rituximab/prednisone. Haemophilia 2014; 20: e185-8.
Green D, Lechner K. A survey of 215 non-hemophilic patients with inhibitors to Factor VIII. Thromb Haemost 1981; 45: 200-3.
Astermark J, Santagostino E, Hoots WK. Clinical issues in inhibitors. Haemophilia 2010; 16(Suppl 5): 54-60.
Doering CB, Healey JF, Parker ET, Barrow RT, Lollar P. High level expression of recombinant porcine coagulation factor VIII. J Biol Chem 2002; 277: 38345-9.
Altieri D, Capitanio AM, Mannucci PM. von Willebrand factor contaminating porcine factor VIII concentrate (Hyate:C) causes platelet aggregation. Br J Haematol 1986; 63: 703-11.
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Verbruggen B, Novakova I, Wessels H, Boezeman J, van den Berg M, Mauser-Bunschoten E. The Nijmegen modification of the bethesda assay for factor VIII: C inhibitors: improved specificity and reliability. Thromb Haemost 1995; 73: 247-51.
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Ma AD, Carrizosa D. Acquired factor VIII inhibitors: pathophysiology and treatment. Hematology Am Soc Hematol Educ Program 2006; 432-7.
Mahlangu J, Andreeva T, Macfarlane D et al. A phase II open-label study evaluating the hemostatic activity, pharmacokinetics and safety of recombinant porcine factor VIII (OBI-1) in hemophilia A patients with inhibitors directed against human FVIII. Haemophilia 2008; 14(Suppl 2): 15-6.
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1995; 73
2012; 120
2010; 16
1993; 81
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2008; 14
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2012; 10
1981; 45
2014; 20
1995; 86
1989; 149
2013; 14
1986; 63
2009; 94
1991; 65
2014; 13
2013; 110
1996; 9
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References_xml – reference: Morrison AE, Ludlam CA, Kessler C. Use of porcine factor VIII in the treatment of patients with acquired hemophilia. Blood 1993; 81: 1513-20.
– reference: Lloyd JV, Street AM, Berry E et al. Cross-reactivity to porcine factor VIII of factor VIII inhibitors in patients with haemophilia in Australia and New Zealand. Aust N Z J Med 1997; 27: 658-64.
– reference: Franchini M, Mannucci PM. Acquired haemophilia A: a 2013 update. Thromb Haemost 2013; 110: 1114-20.
– reference: Green D, Lechner K. A survey of 215 non-hemophilic patients with inhibitors to Factor VIII. Thromb Haemost 1981; 45: 200-3.
– reference: Huth-Kühne A, Baudo F, Collins P et al. International recommendations on the diagnosis and treatment of patients with acquired hemophilia A. Haematologica 2009; 94: 566-75.
– reference: Collins PW, Chalmers E, Hart D et al. Diagnosis and management of acquired coagulation inhibitors: a guideline from UKHCDO. Br J Haematol 2013; 162: 758-73.
– reference: Brettler DB, Forsberg AD, Levine PH et al. The use of porcine factor VIII concentrate (Hyate:C) in the treatment of patients with inhibitor antibodies to factor VIII. A multicenter US experience. Arch Intern Med 1989; 149: 1381-5.
– reference: Altieri D, Capitanio AM, Mannucci PM. von Willebrand factor contaminating porcine factor VIII concentrate (Hyate:C) causes platelet aggregation. Br J Haematol 1986; 63: 703-11.
– reference: Hay CRM. Porcine factor VIII: current status and future developments. Haemophilia 2002; 8(Suppl 1): 24-7.
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– reference: Ma AD, Carrizosa D. Acquired factor VIII inhibitors: pathophysiology and treatment. Hematology Am Soc Hematol Educ Program 2006; 432-7.
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– reference: Cugno M, Gualtierotti R, Tedeschi A, Meroni PL. Autoantibodies to coagulation factors: from pathophysiology to diagnosis and therapy. Autoimmun Rev 2014; 13: 40-8.
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– reference: Toschi V. OBI-1, porcine recombinant Factor VIII for the potential treatment of patients with congenital hemophilia A and alloantibodies against human Factor VIII. Curr Opin Mol Ther 2010; 12: 617-25.
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Snippet Summary Acquired haemophilia A (AHA) is a rare bleeding disorder caused by autoantibodies against human factor VIII (hFVIII). OBI‐1 is an investigational,...
Acquired haemophilia A ( AHA ) is a rare bleeding disorder caused by autoantibodies against human factor VIII ( hFVIII ). OBI ‐1 is an investigational,...
Acquired haemophilia A (AHA) is a rare bleeding disorder caused by autoantibodies against human factor VIII (hFVIII). OBI-1 is an investigational, B-domain...
Acquired haemophilia A (AHA) is a rare bleeding disorder caused by autoantibodies against human factor VIII (hFVIII). OBI‐1 is an investigational, B‐domain...
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StartPage 162
SubjectTerms acquired haemophilia A
Adult
Aged
Aged, 80 and over
Animals
Antibodies, Neutralizing
Autoantibodies
Autoantibodies - immunology
Bleeding
bleeding episodes
Coagulation factors
Cross Reactions - immunology
Dosage
Factor VIII - administration & dosage
Factor VIII - adverse effects
Factor VIII - immunology
Factor VIII - therapeutic use
Female
Hemophilia
Hemophilia A - drug therapy
Hemophilia A - immunology
Humans
Hypersensitivity
Male
Middle Aged
recombinant FVIII porcine sequence
Recombinant Proteins - administration & dosage
Recombinant Proteins - adverse effects
Recombinant Proteins - immunology
Recombinant Proteins - therapeutic use
replacement therapy
Swine
Thrombocytopenia
Time Factors
Treatment Outcome
Title Efficacy and safety of OBI-1, an antihaemophilic factor VIII (recombinant), porcine sequence, in subjects with acquired haemophilia A
URI https://api.istex.fr/ark:/67375/WNG-H855BS56-R/fulltext.pdf
https://onlinelibrary.wiley.com/doi/abs/10.1111%2Fhae.12627
https://www.ncbi.nlm.nih.gov/pubmed/25623166
https://www.proquest.com/docview/2629100900
https://www.proquest.com/docview/1657315940
Volume 21
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