Retrospective Cohort Study
Copyright ©The Author(s) 2017.
World J Orthop. Dec 18, 2017; 8(12): 902-912
Published online Dec 18, 2017. doi: 10.5312/wjo.v8.i12.902
Figure 1
Figure 1 Study population. 1See Appendix 1. DNR: Do-Not-Resuscitate.