Funding for this research was provided by:
CAMS Innovation Fund for Medical Science (CAMS-2017-I2M-1-011)
Received: 15 September 2019
Accepted: 12 May 2020
First Online: 28 May 2020
Ethics approval and consent to participate
: The study protocol was approved by the Ethics Committee of Peking Union Medical College Hospital (ZS-1359). All subjects signed informed consent before the trial.
: Not applicable.
: The authors declare that they have no competing interests.