Correction to: BMC Pregnancy Childbirth 21, 262 (2021)
https://doi.org/10.1186/s12884-021-03737-1
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Following publication of the original article [1], the authors reported an error in the author-group. Qiuzhen Wang is also the corresponding author.
Zhenhong Zhang1†, Qian Xu2†, Yanping Chen2, Lun Sui2, Lu Jiang2, Qianqian Shen1, Minyu Li1, Guoju Li2* and Qiuzhen Wang1*
The original article has been updated.
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