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. 2020 Mar 30;39(15):2101–2114. doi: 10.1002/sim.8535

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© 2020 The Authors. Statistics in Medicine published by John Wiley & Sons, Ltd.

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.

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SIM-8535-FIG-0010-c — Outbreak signals during 2012 to 2017 given by the cumulative sum control charts. The blue line denotes the threshold determined by Ministry of Health [Colour figure can be viewed at wileyonlinelibrary.com]