Article History
Received: 28 January 2020
Accepted: 25 June 2020
First Online: 4 July 2020
Compliance with ethical standards
:
: All the authors have no financial or proprietary interest in any product, method or material described in this manuscript. They declare that they have no competing interests.
: The study followed the tenets of the Declaration of Helsinki and was approved by the Peking University Third Hospital Medical Science Research Ethics Committee.
: All patients provided written informed consent.
: All patients provided written informed consent.