Article History
Received: 15 August 2019
Revised: 28 October 2019
Accepted: 3 November 2019
First Online: 30 November 2019
Compliance with ethical standards
:
: YL declares that she has no conflict of interest. QLY declares that she has no conflict of interest. FFJ declares that she has no conflict of interest. HS declares that she has no conflict of interest. ZLY declares that she has no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee (The Ethics Committee of the First Affiliated Hospital of Nanjing Medical University, China) and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.