Evidence for geographical and racial variation in serum sex steroid levels in older men

Eric S. Orwoll, Carrie M. Nielson, Fernand Labrie, Elizabeth Barrett-Connor, Jane A. Cauley, Steven R. Cummings, Kristine Ensrud, Magnus Karlsson, Edith Lau, P. C. Leung, Östen Lunggren, Dan Mellström, Alan L. Patrick, Marcia L. Stefanick, Kozo Nakamura, Noriko Yoshimura, Joseph Zmuda, Liesbeth Vandenput, Claes Ohlsson