Wang, Y. http://orcid.org/0000-0003-4536-9904
Zhang, J. http://orcid.org/0000-0003-1739-6462
Guo, S. http://orcid.org/0000-0002-7418-6915
Dong, Z. http://orcid.org/0000-0002-2181-8173
Meng, X.
Zheng, G.
Yang, D.
Zheng, Z. http://orcid.org/0000-0003-1939-8138
Zhao, Y. http://orcid.org/0000-0002-7760-916X
Funding for this research was provided by:
University of Science and Technology Liaoning (2018416017)
Article History
Received: 8 December 2018
Accepted: 28 February 2019
First Online: 22 March 2019
Compliance with ethical standards
:
: The authors declare that there are no conflicts of interest related to this study.
: The contents of this article are data mining from the Surveillance, Epidemiology and End Results (SEER) database. The SEER database is open and shared. The data released from the SEER database did not require informed patient consent because cancer is a reportable disease in every state in the US.
: The data released from the SEER database did not require informed patient consent because cancer is a reportable disease in every state in the US. Therefore, we do not need to sign further informed consent in our article (not applicable).