Li, Jing
Qiu, Jie
Lv, Ling
Mao, Baohong
Huang, Lei
Yang, Tao
Wang, Cheng
Liu, Qing
Funding for this research was provided by:
Special support project for Key Laboratory of science and Technology Department of Gansu Province (No.: 1506rtsa158)
Article History
Received: 15 January 2020
Accepted: 11 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: This work has been carried out in accordance with the Declaration of Helsinki (2000) of the World Medical Association. This study was approved by the human investigation committees at the Gansu Provincial Maternity and Child Care Hospital and Yale University. All patients provided informed written consent.
: Not applicable.
: The authors declare that they have no competing interests.