RT Journal Article SR Electronic T1 What is a ‘failure’ of bisphosphonate therapy for osteoporosis? JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 1033 OP 1039 VO 72 IS 11 A1 Carey, John J. YR 2005 UL http://www.ccjm.org/content/72/11/1033.abstract AB Assessing the effectiveness of bisphosphonate therapy is problematic. Bone mineral density and markers of bone turnover are often used, but the true measure is prevention of new fractures.