1. University of Oxford; Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences; Botnar Research Centre, Windmill Road Oxford UK OX3 7LD
2. UK Cochrane Centre; Oxford UK
3. University of Oxford; Division of Clinical Geratology, Nuffield Department of Clinical Medicine; Radcliffe Infirmary Woodstock Road Oxford UK OX2 6HE