Li, Shanshan
Cui, Liufu
Cheng, Jin
Shu, Rong
Chen, Shuohua
Nguyen, Uyen-Sa
Misra, Devyani
Wu, Shouling
Gao, Xiang
Article History
Received: 8 July 2019
Accepted: 31 March 2020
First Online: 15 April 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of the Kailuan Medical Group and the Brigham and Women’s Hospital, Boston.All participants gave their written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.