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We read with great interest Liu et al’s study.1 The aim of this response to Liu et al’s study is to illustrate some of the problems in estimating the number of suicides by charcoal burning in Taiwan. Using the number of deaths in category ICD-9 code E952 (suicide and self-inflicted poisoning by other gases and vapors) as an estimation of the number of charcoal burning suicides …
Competing interests: None.