Liu, Ming
Xue, Mengqi
Yang, Qing
Du, Wenchong
Yan, Xiaoling
Tan, Jing
Duan, Tao
Hua, Jing
Funding for this research was provided by:
National Natural Science Foundation of China (81673179)
the Science and Technology Commission of Shanghai Municipality (18140903100)
the Shenkang Hospital Development Center under Grant (SHDC12016239)
Shanghai municipal medical and health discipline construction projects under Grant (2017ZZ02015)
Article History
Received: 8 February 2020
Accepted: 10 March 2021
First Online: 17 March 2021
Declarations
:
: The study received ethical approval from the Local Committee of Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, China (No. ks1785). The ethical committee has approved that the individual informed consent was not considered because almost all medical record data were collected at the institutional level without identifying the individuals.
: Not applicable.
: The authors declare that they have no competing interests.