Funding for this research was provided by:
National Natural Science Foundation of China (No. 81801029, No. 81701023)
the Priority Academic Program Development of Jiangsu Higher Education Institutions (No. 2018-87)
Received: 28 December 2018
Accepted: 29 March 2020
First Online: 10 April 2020
Ethics approval and consent to participate
: This research proposal was conducted in full accordance with the World Medical Association Declaration of Helsinki and has obtained the approval from the Ethics Committee of Nanjing Medical University (No. PJ 2017–047-001). Written informed consents were obtained for all participants.
: Not applicable.
: The authors declare that they have no competing interests.