Igarashi, Mutsuo
Jeglič, Peter
Krajnc, Andraž
Žitko, Rok
Nakano, Takehito
Nozue, Yasuo
Arčon, Denis
Article History
Received: 23 June 2015
Accepted: 23 November 2015
First Online: 4 January 2016
Competing interests
: The authors declare no competing financial interests.