Comparison of the effects of estrogen alone and estrogen plus androgen on biomechanical markers of bone formation and resorption in postmenopausal women. - Raisz,L.G.; Wiita,B.; Artis,A.; Bowen,A.; Schwartz,S.; Trahiotis,M.; Shoukri,K.; Smith,J. (J Clin Endocrinol Metab, 1996)