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