Received: 26 November 2019
Accepted: 15 April 2020
First Online: 13 May 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of the Cancer Hospital Chinese Academy of Medical Sciences (Beijing, China). All animal studies were performed according to the Institutional Ethical Guidelines on Animal Care and were approved by the Institutional Animal Care and Use Committee of the Shanghai Institute of Materia Medica.
: All authors have agreed to publish this manuscript.
: The authors declared that they had no conflict of interest.