%0 Journal Article %K Birth Weight %K Congenital Abnormalities %K Diseases in Twins %K Female %K Genetics, Medical %K Humans %K leprosy %K Male %K Methods %K Pharmaceutical Preparations %K Pregnancy %K Pregnancy, Multiple %K Twins %B Acta geneticae medicae et gemellologiae %D 1976 %G eng %P 249-58 %R 10.1017/s0001566000014215 %T Twin studies in medical genetics. %V 25 %1 http://www.ncbi.nlm.nih.gov/pubmed/1031532?dopt=Abstract %8 1976