abo blood group system antigen apheresis blood donation blood plasma blood product blood substitutes blood transfusion blood type colton antigen system cross-matching cryoprecipitate diego antigen system duffy antigen system epithelium exchange transfusion fucosyltransferase gene hh antigen system human blood group systems ii antigen system kell antigen system kidd antigen system leukapheresis lutheran antigen system mns antigen system national center for biotechnology information other red cell antigens p antigen system plasmapheresis platelet plateletpheresis red blood cell rhesus blood group system transfusion medicine whole blood xg antigen system yt antigen system