Funding for this research was provided by:
CSCO-Qilu Cancer Research Fund (Y-Q2017-011)
Shanghai Municipal Commission of Health and Family Planning Research Fund (20164Y0201)
Article History
Received: 23 June 2019
Accepted: 10 August 2019
First Online: 26 August 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interests.