Funding for this research was provided by:
National Natural Science Foundation of China (81970835, 81800867)
Received: 19 November 2019
Accepted: 13 April 2020
First Online: 22 April 2020
Ethics approval and consent to participate
: Not applicable.
: The risks of identification of all recruited patients were minimized. Written consent for publication was obtained from each patient. The consent included a statement that authorized the authors to publish patient’s photos and data for research purposes in an anonymous manner. Copy of the written consents are available for review by the Editor of this journal.
: The authors declare that they have no competing interests.