Funding for this research was provided by:
Nanjing Medical Science and Technique Development Foundation (QRX17037)
Received: 25 November 2018
Accepted: 21 July 2019
First Online: 5 August 2019
Ethics approval and consent to participate
: The study was approved by the Ethical Committee at Nanjing Drum Tower Hospital (study number 2017–167-01). All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 2013 Helsinki declaration. Written informed consent was obtained from all individual participants included in the study.
: Not applicable.
: The authors declare that they have no competing interests.