Received: 16 November 2019
Accepted: 18 May 2020
First Online: 5 June 2020
Ethics approval and consent to participate
: The study protocol was approved by the Ethics Committee of Liaoning Cancer Hospital and Institute, China on 1 March 2017 (approval No. 20170234). All patients participating will sign an informed consent form.
: Not applicable
: All the authors of the article declare that there are no conflicts of interest relating to this work that can be construed because their positions have no influence on the study opinions and data obtained during the study procedure and article writing. This study has not received funding assistance from other commercial organizations. It is independent from the sponsor and any competing interests.