Received: 10 April 2020
Accepted: 3 August 2020
First Online: 21 October 2020
Ethics approval and consent to participate
: The current study was approved by the Ethics Committee of Harbin Medical University Cancer Hospital and performed in strict accordance with the <i>Declaration of Helsinki</i>. All participants signed informed consent prior to enrollment. Extensive efforts were made to ensure minimal usage of animals as well as their suffering.
: Not applicable.
: The author declares no competing interest exists.