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Body mass index, occupational activity, and leisure-time physical activity: an exploration of risk factors and modifiers for knee osteoarthritis in the 1946 British birth cohort

Kathryn R Martin*, Diana Kuh, Tamara B Harris, Jack M Guralnik, David Coggon and Andrew K Wills

BMC Musculoskeletal Disorders 2013, 14:219  doi:10.1186/1471-2474-14-219