Article History
Received: 29 August 2019
Accepted: 25 November 2019
First Online: 11 December 2019
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.
: Ethical approval was achieved from the Ethics Committee of Taichung Veterans General Hospital, Taiwan, and the study was conducted in accordance with the Declaration of Helsinki.
: Written informed consent was obtained from each patient.