. 2021 Aug 10;63(1):e12247. doi: 10.1002/1348-9585.12247
© 2021 The Authors. Journal of Occupational Health published by John Wiley & Sons Australia, Ltd on behalf of The Japan Society for Occupational Health
This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
FIGURE 2.
Flow chart of the sample selection process