Received: 5 December 2019
Accepted: 26 March 2020
First Online: 6 April 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of Honghui Hospital, Xi’an Jiaotong University (No.201902023), and the written informed consent was obtained from the volunteer.
: Not applicable.
: The authors declare that they have no competing interests.