The incidence/window period model and its use to assess the risk of transfusion-transmitted human immunodeficiency virus and hepatitis C virus infection

a Retrovirus Epidemiology Donor Study, Rockville, MD USA

b Westat Inc, Rockville, MD USA

c Irwin Memorial Blood Centers, San Francisco, CA USA

d University of California at San Francisco, San Francisco, CA USA

e American Red Cross Greater Chesapeake and Potomoc Region, Baltimore, MD USA

f American Red Cross Southeastern Michigan Region, Detroit, MI USA

g American Red Cross Southern California Region, Los Angeles, CA USA

h Oklahoma Blood Institute, Oklahoma City, OK USA

i National Heart, Lung, and Blood Institute, Bethesda, MD USA