Received: 9 August 2019
Accepted: 2 January 2020
First Online: 15 January 2020
Ethics approval and consent to participate
: This study was approved by the institutional review board of the Xinhua Hospital affiliated to Shanghai Jiaotong University School of Medicine. All patients gave written informed consent before participating in this study.
: All patients and their families gave their written informed consent for the publication of their individual data and identifying photographs.
: The authors declare that they have no competing interests.