Funding for this research was provided by:
Natural Science Foundation of Jiangsu Province (NO.BK20151592)
National Natural Science Foundation of China (81471215, 81271211, 81471642, 81571652)
Jiangsu Natural Science Foundation Grant (BK20151592)
Text and Data Mining valid from 2018-04-27
Received: 22 January 2018
Accepted: 10 April 2018
First Online: 27 April 2018
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of Northern Jiangsu People's Hospital, Yangzhou University, with informed consent provided by all participants.
: The authors declare that they have no competing interests.