abo blood group system allele alloimmunity antigen apheresis blood donation blood plasma blood product blood substitutes blood transfusion blood type cross-matching cryoprecipitate diego antigen system duffy antigen system exchange transfusion hemolytic anemia hemolytic disease of the newborn hh antigen system homeostasis human blood group systems ii antigen system kell antigen system kidd antigen system kidney leukapheresis lewis antigen system lutheran antigen system mns antigen system national center for biotechnology information other red cell antigens p antigen system plasmapheresis platelet plateletpheresis protein red blood cell rhesus blood group system transfusion medicine transfusion reaction whole blood xg antigen system yt antigen system