Funding for this research was provided by:
Beijing Municipal Science and Technology Project (Z151100003915109)
Beijing Hope Marathon Special Fund of Chinese Cancer Foundation (LC2013A18)
Article History
Received: 4 July 2018
Accepted: 27 August 2018
First Online: 22 September 2018
Ethics approval and consent to participate
: The study has been approved by the Ethics Committee of National Cancer Center/Cancer Hospital (Reference: NCC2013YZ-06). Written informed consent was obtained from each participant prior to data collection or study intervention.
: Not applicable.
: The authors declare that they have no competing interests.
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