Uesugi, S
Ishihara, J
Iso, H
Sawada, N
Takachi, R
Inoue, M
Tsugane, S
,
Article History
Received: 2 June 2016
Revised: 14 February 2017
Accepted: 30 March 2017
First Online: 12 July 2017
Competing interests
: The authors declare no conflict of interest.