Received: 2 December 2019
Accepted: 18 May 2020
First Online: 4 June 2020
Ethics approval and consent to participate
: This study was approved by the ethics committee of Qingyuan People’s Hospital, the Sixth Affiliated Hospital of Guangzhou Medical University. Written informed consent was obtained from the patient included in the study.
: Not applicable.
: The authors declare that they have no competing interests.