Nagahama, Tomoo
Nakane, Hideaki
Fujinuma, Yasumi
Ninomiya, Mariko
Ogawa, Hideo
Fukui, Yasuo
Article History
Received: 20 November 1998
Revised: 30 July 1999
Accepted: 6 September 1999
First Online: 20 June 2014
Free to read: This content has been made available to all.