Estrogen-containing contraceptives Bisphosphonates Fluoride Hormone replacement therapy (i.e., tibolone, estrogen, estrogen-like compounds such as raloxifene) Calcitonin Strontium Parathyroid hormone or derivatives Supplemental vitamin D (>1000 IU/day) Glucocorticosteroids (inhaled or topical corticosteroids administered more than 2 weeks prior to enrolment are allowed) Anabolic steroids Calcitriol Diuretics