. 2018 Jun 22;58(8):1203–1210. doi: 10.1111/head.13344
© 2018 The Authors. Headache: The Journal of Head and Face Pain published by Wiley Periodicals, Inc. on behalf of American Headache Society
This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
Figure 1.
—Flowchart study flow.