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Individual and occupational risk factors for knee osteoarthritis: results of a case-control study in Germany

André Klussmann*, Hansjürgen Gebhardt, Matthias Nübling, Falk Liebers, Emilio Quirós Perea, Wolfgang Cordier, Lars V von Engelhardt, Markus Schubert, Andreas Dávid, Bertil Bouillon and Monika A Rieger

Arthritis Research & Therapy 2010, 12:R88  doi:10.1186/ar3015