Received: 15 March 2019
Accepted: 20 May 2019
First Online: 7 June 2019
Ethics approval and consent to participate
: Ethical approval was obtained from the Ethics Committee of Ganzhou People’s Hospital. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and national research committee. Written informed consent was obtained from all individual participants included in this study.
: Not applicable.
: The authors declare that they have no competing interests.