Genetic and environmental effects on the bone development of the hand and wrist in Chinese young twins.

We assessed genetic and environmental effects on bone development of the hand and wrist,and on key anthropometric measures in Chinese young twins.In total,139 monozygotic and 95 dizygotic twin pairs aged from 5 to 18 years were recruited.The twin correlations of total hand and wrist scores for monozygotic(MZ)and dizygotic(DZ)twins were0.71 and 0.36,respectively.Bivariate model