1Departments of Orthopaedic Surgery (W.F. and M.F.) and Internal Medicine (M.M. and L.M.F.O.), Baerum Hospital, Vestre Viken Hospital Trust, Baerum, Norway
2Department of Geriatrics, St. Olav Hospital, University Hospital of Trondheim, Trondheim, Norway
3Department of Neuromedicine and Movement Science, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
4Division of Orthopaedic Surgery, Oslo University Hospital, Oslo, Norway
5Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
E-mail address for W. Figved: email@example.com
Investigation performed at the Departments of Orthopaedic Surgery and Internal Medicine, Baerum Hospital, Vestre Viken Hospital Trust, Baerum, Norway
Disclosure: There was no source of external funding for this study. On the Disclosure of Potential Conflicts of Interest forms, which are provided with the online version of the article, one or more of the authors checked “yes” to indicate that the author had a relevant financial relationship in the biomedical arena outside the submitted work (http://links.lww.com/JBJSREV/A453).