Received: 7 January 2020
Accepted: 4 June 2020
First Online: 11 June 2020
: This article is designed and submitted acting on guideline of IRB of Affiliated Hospital of Qingdao University.
: All patients have signed consent forms to participate this study. All the patients have signed consent forms to publish images or other personal or clinical details in the article.
: The authors declare that they have no competing interests. No funds were received in support of this work. No benefits in any form have been or will be received from a commercial party related directly or indirectly to the subject of this manuscript.