Funding for this research was provided by:
The Health and family Planning Commission of shangha (201440510)
The Project of Research doctor of Changzheng Hospita (201712)
Text and Data Mining valid from 2019-01-08
Received: 24 November 2018
Accepted: 31 December 2018
First Online: 8 January 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee (Guilan University of Medical Sciences) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from the patients.