Funding for this research was provided by:
National Taiwan University Hospital (106-M3739, 106-003612, 107-N3971, 107-N4038)
Article History
Received: 25 March 2019
Revised: 9 May 2019
Accepted: 3 June 2019
First Online: 11 June 2019
Compliance with ethical standards
: This study was approved by the Research Ethics Committee of National Taiwan University Hospital (201504071RINC) and conducted in accordance with the Declaration of Helsinki.
: The authors declare that they have no conflict of interest.