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. 2021 Jan 8;11(1):e037793. doi: 10.1136/bmjopen-2020-037793

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© Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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The distribution of centres and the population density of China. Thirteen centres from 11 different provinces participated the Chinese Acute-on-Chronic Liver Failure (CATCH-LIFE) validation cohort. Red dots indicate the 12 of the 13 participating centres that also participated in the CATCH-LIFE investigation cohort. The green dot is the new participating centre in Zhejiang province. Blue dots are two centres in Tianjin and Fujian provinces participated in the investigation cohort but are not active in this study. The distribution of the centres accords with the population distribution of China.