Funding for this research was provided by:
Taipei Veterans General Hospital (V107EA-008)
Ministry of Education (107QC018-2)
National Yang-Ming University (107F-M01-0603)
Received: 17 September 2019
Accepted: 4 May 2020
First Online: 15 May 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Taipei Veteran General Hospital with ID number of 2014–02-007 AC and 2015–12-015 BC and performed in compliance with the Declaration of Helsinki (24). It complied with informed voluntariness, and all participants have given their written consent for participation.
: Not applicable, as the manuscript does not contain any individual person’s data.
: The authors declare that they have no competing interests.