Funding for this research was provided by:
Taipei Veterans General Hospital, Taipei, Taiwan (V105E18-004-MY3, V105C-117, and V104C-101)
Article History
Received: 20 March 2018
Accepted: 3 July 2018
First Online: 9 July 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.