Article History
Received: 31 March 2020
Accepted: 20 August 2020
First Online: 26 August 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The survey was administered to patients who signed a written consent form. For the ethical protection of the subjects, the study was approved by the Institutional Review Board of the National Cancer Center in Korea (No. NCC2019-0023).