Funding for this research was provided by:
Qingdao Outstanding Young Health Professional Development Fund
Qingdao People's Livelihood Science and Technology Program (17-3-3-6-nsh)
Received: 21 April 2020
Accepted: 8 March 2021
First Online: 20 March 2021
: This study has been approved by the institutional review board of the ethics committee in our hospital (QFELL-KY-2020-07).
: For the 10 cases in our institution, consents for publication have been obtained from patients.
: The authors declare that they have no competing interests.