Funding for this research was provided by:
National Natural Science Foundation of China (81601342)
Shandong Medical Health Science and Technology Development Program (2018WS258)
Received: 10 May 2020
Accepted: 26 December 2020
First Online: 8 January 2021
Ethics approval and consent to participate
: The study was approved by the Institutional Review Board of the First Affiliated Hospital of Shandong First Medical University, Jinan, China.
: The patients signed informed consent regarding publishing their data and photographs.
: The authors declare that they have no competing interests.