Steroid therapy, use of selective estrogen receptor modulators (SERMs) or hormonal agents (including tamoxifen, raloxifene, estrogen, DHEA, anabolic steroids, oral contraceptives, depoprovera, progestin IUD, oral progestins, norplant, or drugs to induce ovulation) within 6 months prior to study entry and must agree not to use these compounds until completion of the three-month follow-up study.