title: Twinning and blood groups. II. Distribution of ABO, MN and Rh-Hr phenotypes in a twin sample.
mesh_terms: D000017:ABO Blood-Group System; D001789:Blood Group Antigens; D005260:Female; D006801:Humans; D007558:Italy; D008951:MNSs Blood-Group System; D010641:Phenotype; D011247:Pregnancy; D012204:Rh-Hr Blood-Group System; D012737:Sex Factors; D014427:Twins
chemical_list: D000017:ABO Blood-Group System; D001789:Blood Group Antigens; D008951:MNSs Blood-Group System; D012204:Rh-Hr Blood-Group System