title: Does supplementation with calcium alone or in combination with vitamin D reduce the risk of osteoporotic fracture?
authors.affiliation: Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital, 221 Longwood Avenue, RFB-2, Boston, MA 02115, USA. cbbecker@partners.org
authors.forename: Carolyn B
authors.initials: CB
authors.lastname: Becker