Correction to: BMC Pregnancy Childbirth 21, 262 (2021)

https://doi.org/10.1186/s12884-021-03737-1

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.