Tang, Qiuqin
Pan, Feng
Yang, Jing
Fu, Ziqiang
Lu, Yiwen
Wu, Xian
Han, Xiumei
Chen, Minjian
Lu, Chuncheng
Xia, Yankai
Wang, Xinru
Funding for this research was provided by:
National Natural Science Foundation of China (81673217)
Jiangsu Overseas Visiting Scholar Program for University Prominent Young & Middle-aged Teachers and Presidents
Priority Academic Program for the Development of Jiangsu Higher Education Institutions
Article History
Received: 4 July 2018
Accepted: 14 October 2018
First Online: 29 October 2018
Ethics approval and consent to participate
: All males in our study provided written informed consent. The study was approved by the Institutional Review Board of Nanjing Medical University.
: Not applicable.
: The authors declare that they have no competing interests.
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