by O’Brien, Linda A., Siegert, Elisabeth A., Grisso, Jeane Ann, Maislin, Greg, LaPann, Karin, Evans, Lois K., Dnsc, Krotki, Karol P.
Published in Journal of general internal medicine : JGIM (01.06.1997)

by Currie, SG, Gough, JH, Hole, GJC, Krotki, KP, Maranda, F
Published in Journal of official statistics (01.09.1986)