Received: 10 January 2019
Accepted: 9 October 2019
First Online: 25 October 2019
Ethics approval and consent to participate
: Each author certifies that his institution has approved the human protocol for this investigation, that all investigations were conducted in conformity with ethical principles of research, and that informed consent was obtained.The Research Ethics Committee of the National Taiwan University Hospital approved this study (201601015RIND).
: Not applicable
: The authors declare that they have no competing interests.