North-American twins with IDDM. Genetic, etiological, and clinical significance of disease concordance according to age, zygosity, and the interval after diagnosis in first twin. - Kumar,D.; Gemayel,N.S.; Deapen,D.; Kapadia,D.; Yamashita,P.H.; Lee,M.; Dwyer,J.H.; Roy-Burman,P.; Bray,G.A.; Mack,T.M. (Diabetes, 1993)