Article History
Received: 26 July 2019
Accepted: 23 December 2019
First Online: 30 December 2019
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board (Pusan Nation University Yangsan Hospital, Yangsan, South Korea), and written informed consent was obtained from all subjects. All testing was conducted in a manner compliant with the Health Insurance Portability and Accountability Act and adhered to the tenets of the Declaration of Helsinki.
: Not applicable. No personal information is included in this study.
: The authors declare that they have no competing interests.