“…Intravenous infusion of clotting factor concentrates derived from donor pools of human plasma are highly effective in the treatment of hemophilic bleeding episodes and have been widely used since 1970. Hemophiliacs can treat themselves with the concentrates at home in a more timely fashion than was formerly possible, thus improving quality of life and lengthening the life-span (Mason, Olson, Myers, Huszti, & Kenning, 1989). Unfortunately, in the late 1970s and early 1980s, the donor blood supply was contaminated with human immunodeficiency virus (HIV), resulting in the infection of 60% of individuals with hemophilia (Dew, Ragni, & Nimorwicz, 1990).…”