Funding for this research was provided by:
National Natural Science Foundation of China (U1736219, 61571327)
Article History
First Online: 10 June 2019
Compliance with ethical standards
:
: Jin Gu, Baolin Liu, Xianglin Li, Peiyuan Wang, Bin Wang declare that they have no actual or potential conflict of interest including any financial, personal or other relationships with other people or organizations that can inappropriately influence our work. All of the authors declare that the work described in the manuscript was original research that has not been published previously, and was not under consideration for publication elsewhere, in whole or in part.
: This study was approved by the Research Ethics Committee of Tianjin University. All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, and the applicable revisions at the time of the investigation.
: Informed consent was obtained from all subjects for being included in the study.