title: Four families demonstrating a rare aberrant reaction of an anti-Gm(a).
mesh_terms: D005260:Female; D006385:Hemagglutination Inhibition Tests; D006386:Hemagglutination Tests; D006801:Humans; D007125:Immunogenetics; D007074:Immunoglobulin G; D008297:Male; D010375:Pedigree
chemical_list: D007074:Immunoglobulin G