Funding for this research was provided by:
Program for Innovation Team Building at Institutions of Higher Education in Chongqing in 2016 (NO CXTDG201602006)
Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education
the Scientific and Technological Research Program of Health and Family planning Commission of Chongqing Province (2017ZDXM019)
Article History
Received: 29 August 2017
Accepted: 8 January 2018
First Online: 18 January 2018
Compliance with ethical standard
:
: The authors declare that they have no conflicts of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.