Funding for this research was provided by:
Shaoguan Health Research Project (Y17020)
Shaoguan Science and Technology Plan Project (2017cx/013)
Article History
Received: 5 March 2020
Accepted: 18 May 2020
First Online: 27 May 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Review Committee of Yuebei People’s Hospital. The administrative permissions were acquired by our team to access the data we used in this research.Patients provided written informed consent to participate in this study.
: Not applicable.
: The authors declare that they have no competing interests.