Funding for this research was provided by:
special fund for clinical medicine of Jiangsu province (BL2013022)
Health Department of Jiangsu Province (JS2006038)
Text and Data Mining valid from 2018-10-16
Received: 21 July 2017
Accepted: 25 September 2018
First Online: 16 October 2018
Ethics approval and consent to participate
: Verbal informed consent was obtained from the subjects involved in the study. The protocol was conducted in accordance with the Declaration of Helsinki and approved by the institutional ethical board of Northern Jiangsu People’s Hospital, Jiangsu Province, China.
: Not applicable.
: The authors declare that they have no competing interests.
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