Heritability and environmental factors affecting vitamin D status in rural Chinese adolescent twins.
Arguelles LM, Langman CB, Ariza AJ, Ali FN, Dilley K, Price H, Liu X, Zhang S, Hong X, Wang B, et al. J Clin Endocrinol Metab. 2009 Sep; 94(9):3273-81. Epub 2009 Jun 23.