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Authors
Cheng, Qinqin
Xu, Xianghua
Liu, Xiangyu
Mao, Ting
Chen, Yongyi https://orcid.org/0000-0002-9079-1496
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Article History
Received: 4 October 2017
Accepted: 20 February 2018
First Online: 16 April 2018
Compliance with ethical standards
: Approval was obtained from the ethics committee of the Hunan Cancer Hospital. Before data collection, all participants were informed of the purposes and potential benefits/risks of the research. Participation was completely voluntary. Informed consent forms were signed after consent was obtained.
: The authors declare that they have no conflicts of interest.
