Received: 8 February 2020
Accepted: 19 June 2020
First Online: 29 June 2020
Ethics approval and consent to participate
: This study was approved by the Daping Hospital Ethics Committee, and all of the study procedures met the stipulations of the WMA Declaration of Helsinki. The patients gave written informed consent and agreed to participate in the study.
: Written informed consent was obtained from all of the patients with respect to publication of this study and any accompanying images.
: The authors declare that they have no competing interests.