. 2011 Sep 2;82(4):417–422. doi: 10.3109/17453674.2011.588859
Copyright: © Nordic Orthopaedic Federation
This is an open-access article distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the source is credited.
Figure 1.
PRISMA flow diagram.