Article History
Received: 28 February 2020
Accepted: 30 May 2020
First Online: 6 July 2020
Ethics approval and consent to participate
: This study protocol and informed consent materials have been approved by the Ethics Committee of Beijing Friendship Hospital of TCM; Ethics Committee approval number: 2019-P-065-01. Written, informed consent to participate will be obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.