Funding for this research was provided by:
This work was supported by the Dong-A University research fund. (none)
Received: 22 April 2020
Accepted: 18 August 2020
First Online: 21 September 2020
Ethics approval and consent to participate
: The cadaveric and clinical studies were approved by the Severance Hospital. The requirement for informed consent from patients was waived.
: Not applicable.
: The authors have no conflict of interest to disclose.