Funding for this research was provided by:
Science and technology project of Guangdong Province (2014A020212059)
Text and Data Mining valid from 2018-04-25
Received: 18 November 2017
Revised: 1 January 2018
Accepted: 16 January 2018
First Online: 25 April 2018
Compliance with ethical standards
: The scientific guarantor of this publication is Rongqin Zheng.
: The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article.
: No complex statistical methods were necessary for this paper.
: Written informed consent was obtained from all subjects (patients) in this study.
: Institutional Review Board approval was obtained.
: • prospective• diagnostic or prognostic study• performed at one institution