The Birmingham twin survey.
D000469:Alkaline Phosphatase; D001789:Blood Group Antigens; D004739:England; D004912:Erythrocytes / Q000201:enzymology; D005260:Female; D005313:Fetal Death; D005838:Genotype; D006801:Humans; D008297:Male; D010920:Placenta / Q000033:anatomy & histology / Q000098:blood supply* / Q000201:enzymology; D011247:Pregnancy; D011272:Pregnancy, Multiple; D014427:Twins; D014428:Twins, Conjoined
D001789:Blood Group Antigens; D000469:Alkaline Phosphatase