Li, Jiacheng
Lu, Chaoxia
Wu, Wei
Liu, Yaping
Wang, Rongrong
Si, Nuo
Meng, Xiaolu
Zhang, Shuyang
Zhang, Xue
Article History
Received: 29 October 2018
Accepted: 25 January 2019
First Online: 15 May 2019
Ethics
: <b>Compliance and ethics</b> The author(s) declare that they have no conflict of interest. The study was approved by the Peking Union Medical College Institutional Review Board, and all individuals signed written informed consent.