I kitea i roto i te 1950s me te kē huaina globulin antihemophilic no te mea o tona kaha ki te whakatika hemophilia A. kitea Factor IX i roto i 1952 i roto i te tūroro taitamariki ki hemophilia B huaina Stephen Christmas (1947<unk>1993). i whakaahuatia tona korenga e Dr. Rosemary Biggs me te Ahorangi R.G. MacFarlane i Oxford, UK. te take, ko reira, i huaina Christmas Factor. noho Christmas i roto i Canada, ka pakanga mo te haumaru toto whakaheke tae noa hinga ki te toto-e pā ana AIDS i te tau 46. he ingoa kē mo te take ko plasma thromboplastin, i homai e te rōpū motuhake i roto i California. huaina RatagemanHageman, rite mohiotia inaianei, XII i roto i 1955 rite te haumanu American ki te haumanu roa huaina Mr. John Christmas (1947<unk>1993). i roto i te UK, i huaina tenei take i roto i te tau kotahi i roto i te tau kotahi i roto i te tau kotahi i te tau kotahi i te tau kotahi i te tau kotahi i te tau kotahi i roto i te
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