Xu, Xin
Article History
Received: 30 November 2020
Revised: 2 February 2021
Accepted: 11 February 2021
First Online: 3 March 2021
Declarations
:
: The authors declare that there is no conflict of interest.
: The study was approved by the Ethics Committee of the Institution of Tianjin Hospital of ITCWM, Nankai Hospital, and was conducted in accordance with the 1975 Declaration of Helsinki.