Received: 12 April 2020
Accepted: 8 December 2020
First Online: 14 December 2020
Ethics approval and consent to participate
: Due to most data was derived from referred literature, ethics approval and consent to participate was not applicable. For survey data, it was approved by Ethics committee of Sun Yat-sen University Cancer Center: 2016-FXY-081.
: Not applicable.
: The authors declare that they have no competing interest.