Funding for this research was provided by:
Ministry of Science and Technology of the People's Republic of China (2014BAI09B02)
Beijing Health Bureau (2013-3-085)
Beijing Municipal Science & Technology Commission (Z151100004015070)
Text and Data Mining valid from 2019-01-16
Received: 20 June 2018
Accepted: 7 January 2019
First Online: 16 January 2019
: The authors declare that they have no competing interests.
: This study was approved by the Peking University Cancer Hospital Ethics Committee. Consent to participate was obtained from every participant. The study was performed in accordance with the Declaration of Helsinki.
: Consent for study results dissemination was obtained from each participant.
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