Guo, Kun
Wei, Yixin
Yuan, Menghui
Wei, Longxiao
Lu, Jie
Article History
Received: 17 November 2019
Accepted: 13 April 2020
First Online: 6 May 2020
Compliance with ethical standards
: This study was approved by the Ethics Committee of the Second Affiliated Hospital of Air Force Medical University (Xi’an, China).
: The authors declare that they have no conflict of interest.
: Informed consent was obtained from all individual participants included in the study.