Polymorphisms in the P450 c17 (17-Hydroxylase/17,20-Lyase) and P450 c19 (Aromatase) genes: association with serum sex steroid concentrations and bone mineral density in postmenopausal women. - Somner,J.; McLellan,S.; Cheung,J. (J Clin Endocrinol Metabol, 2004)