1. Department of Pathophysiology, University of Berne, Berne, Switzerland, Laboratory for Experimental Surgery, Schweizerisches Forschungsinstitut, Davos, Switzerland, Nuffield Department of Orthopedic Surgery, University of Oxford, Oxford, England
2. Department of Pathophysiology, University of Berne, Berne, Switzerland, Nuffield Department of Orthopedic Surgery, University of Oxford, Oxford, England