Author names and affiliations
Shuyuan Yan1, Yanling Wang1, Ying Chen1, Xiaoni Kuang1, Da Hou1, Xueyi Li1, Linglin Pan1, Guangwen Huang2, Xiangwen Peng1*, Jun He1*, Tuanmei Wang1*
1 Changsha Maternal and Child Health Hospital Affiliated to Hunan Normal University, Changsha 410007, China.
2 Hunan Provincial Maternal and Child Health Care Hospital, Changsha, 410008, Hunan Province, China.