Chalhoub, Didier; Cawthon, Peggy M.; Ensrud, Kristine E.; Stefanick, Marcia L.; Kado, Deborah M.; Boudreau, Robert; Greenspan, Susan; Newman, Anne B.; Zmuda, Joseph; Orwoll, Eric S.; Cauley, Jane A.; the Osteoporotic Fractures in Men Study Research Group