Assessment of osteoporosis at the primary health-care level. Technical Report. World Health Organization Collaborating Centre for Metabolic Bone Diseases, University of Sheffield, UK. 2007: Printed by the University of Sheffield. World Health Organization: Assessment of fracture risk and its application to screening for postmenopausal osteoporosis. Technical Report Series 843, Geneva: WHO 1994 - Kanis, JA; World Health Organization Scientific Group