. 2019 Jul 10;90(6):568–574. doi: 10.1080/17453674.2019.1639360
© 2019 The Author(s). Published by Taylor & Francis on behalf of the Nordic Orthopedic Federation
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 1.
Flow chart illustrating extraction of patient level cohort.