Guo, Xiao-Long
Li, Gang
Yin, Shuang
Ma, Ruo-Han
Guo, Yu-Jiao
Bornstein, Michael M.
Funding for this research was provided by:
National Natural Science Foundation of China (81671034)
Article History
Received: 28 December 2018
Accepted: 4 April 2019
First Online: 13 April 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 Institutional Review Board of Peking University School and Hospital of Stomatology (PKUSSIRB-201838111) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: For this type of study, formal consent is not required.