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Bibliography:local:bmj;302/6785/1144
href:bmj-302-1144.pdf
istex:C7386A1DF5CC997FD1A71CB6D138BC47F607EFD8
PMID:2043789
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content type line 23
ObjectType-Report-1
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ISSN:0959-8138
0959-8146
1468-5833
1756-1833
DOI:10.1136/bmj.302.6785.1144