Yang, Huayu
Chen, Haiping
Liu, Fenghua
Ma, Qing
Article History
Received: 10 November 2020
Accepted: 5 May 2021
First Online: 3 June 2021
Declarations
:
: The protocol used in this study was approved by the Institutional Review Board of Beijing Friendship Hospital Affiliated to Capital Medical University. All methods were carried out in accordance with relevant guidelines and regulations or under the declaration of Helsinki.
: The authors declare that they have no competing interests.