**Author details**

Ji Liu1,2,3\* † , Yan-Hua Zhou1,2†, Xiao-Xiao Wang1,2, Ling-Xi Tong1,2, Yan-Hong Li1,2, Ling Liu1,2, Zhi-Yan Xu1,2 and Hong-Hui Wang1,2,3,4\*

1 The Affiliated Weihai Second Municipal Hospital of Qingdao University, Weihai, Shandong, China

2 Weihai Maternal and Child Health Hospital, Weihai, Shandong, China

3 WEGO Ruisheng Medical Devices CO., LTD, Weihai, Shandong, China

4 WEGO Holding Company Limited, Weihai, Shandong, China

\*Address all correspondence to: lljj361@163.com and honghui1223@163.com

† These authors are contribute equally to this study.

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