Liu, Xiaowei
Zhang, Jiatang
Tian, Chenglin
Wang, Jun
Article History
Received: 31 August 2019
Accepted: 6 April 2020
First Online: 1 May 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The study was approved by the Institutional Ethical Committee of Beijing Huairou Hospital. All of the procedures were performed in accordance with the Declaration of Helsinki and relevant policies in China.
: We have obtained written informed consent from all study participants.