title: Further polymorphism in Gc system. Evidence for the occurrence of subgroups.
mesh_terms: D001789:Blood Group Antigens; D002648:Child; D002675:Child, Preschool; D005826:Genetics, Medical; D006801:Humans; D007106:Immune Sera; D005779:Immunodiffusion; D066298:In Vitro Techniques
chemical_list: D001789:Blood Group Antigens; D007106:Immune Sera