Funding for this research was provided by:
Japan Society for the Promotion of Science (15H04996)
Text and Data Mining valid from 2019-06-24
Received: 9 April 2019
Revised: 8 June 2019
Accepted: 12 June 2019
First Online: 24 June 2019
Compliance with ethical standards
: The procedures used in this study were approved by the Institutional Review Board of Kagoshima University Hospital, and the procedures conformed to the tenets of the 1989 Declaration of Helsinki.
: Informed consent was obtained from all individual participants included in the study.
: The authors declare that they have no conflict of interest.