Interaction between the ABO blood group and haptoglobin systems.
D000017:ABO Blood-Group System; D000328:Adult; D001722:Birth Order; D001938:Brazil; D002648:Child; D004899:Erythroblastosis, Fetal / Q000235:genetics; D005260:Female; D005787:Gene Frequency; D006242:Haptoglobins; D006801:Humans; D007231:Infant, Newborn; D007519:Isoantigens; D008288:Malaria / Q000235:genetics; D008297:Male; D011110:Polymorphism, Genetic; D011247:Pregnancy
D000017:ABO Blood-Group System; D006242:Haptoglobins; D007519:Isoantigens