Ono, Takayuki
Oya, Hiroshi
Morioka, Akira
Kumamoto, Atsushi
Kobayashi, Kaori
Obara, Takahiro
Nakagawa, Tomoko
Article History
Received: 24 September 1997
Revised: 5 December 1997
Accepted: 10 December 1997
First Online: 6 June 2014
Free to read: This content has been made available to all.