Liu, Guoyan PhD, MD; Li, Qianwen MD; Shang, Xiaobin PhD, MD; Qi, Zheng PhD, MD; Han, Cha PhD, MD; Wang, Yingmei PhD, MD; Xue, Fengxia PhD, MD
Department of Obstetrics and Gynecology, Tianjin Medical University General Hospital, Tianjin, China
Correspondence to: Guoyan Liu, PhD, MD, Department of Gynecology And Obstetrics, Tianjin Medical University General Hospital, No 154 Anshan Rd, Heping District, Tianjin, PR China. E-mail: [email protected]
The authors have declared they have no conflicts of interest.
The study is partially supported by 2 grants from the Natural Science Fund of China (81101673, 81472761) and Tianjin Science and Technology Committee Foundation (14JCYBJC25300) to G.L.
G.L., Q.L., and X.S. contributed equally to the manuscript.
This work had institutional review board approval of Tianjin Medical University General Hospital.