Xiao-Qin Wang, Yang Li, Yue Zhang, Wen-Jing Kou, Ming-Xu Wang, Department of Public Health, Xi’an Jiaotong University Health Science Center, Xi’an 710061, Shaanxi Province, China
Paul D Terry, Graduate School of Medicine, University of Tennessee Medical Center, Knoxville, TN 37920, United States
Author contributions: Wang XQ wrote the manuscript; Wang XQ and Terry PD analyzed the data; Li Y, Zhang Y, and Kou WJ performed the majority of experiments; Wang XQ and Wang MX designed the research; Wang MX and Terry PD revised the manuscript.
Supported by the Fundamental Research Funds for the Central Universities, No. zdyf2017007.
Institutional review board statement: This study was approved by the Institutional Review Board of Health Science Center of Xi’an Jiaotong University.
Informed consent statement: Informed consent was obtained from all study participants.
Conflict-of-interest statement: The authors declare no conflict of interest.
Open-Access: This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
Corresponding author: Ming-Xu Wang, PhD, Professor, Department of Public Health, Xi’an Jiaotong University Health Science Center, 76 Yanta West Road, Xi’an 710061, Shaanxi Province, China. email@example.com
Telephone: +86-13991815026 Fax: +86-29-82657517
Received: May 16, 2019
Peer-review started: May 16, 2019
First decision: July 21, 2019
Revised: July 25, 2019
Accepted: August 19, 2019
Article in press: August 19, 2019
Published online: September 14, 2019