Liu, Feng
Zhou, Rui
Jiang, Funeng
Liu, Guolong
Li, Kangbao
Zhu, Guodong
Funding for this research was provided by:
Guangdong Planned Project of Science and Technology (2014A020221001)
Guangzhou Planned Project of Science and Technology (201704020105)
Article History
Received: 29 September 2018
First Online: 25 February 2019
Compliance with Ethical Standards
:
: Feng Liu, Rui Zhou, Funeng Jiang, Guolong Liu, Kangbao Li, and Guodong Zhu declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. No ethics approval was declared because the SEER is a publicly available database.
: Extraction of data from the publicly available SEER database does not require informed consent.