1980

Japan

Dr Toshio Wagai

1985

Denmark

Dr Hans Holm

1985

Croatia

Prof Asim Kurjak

1985

USA

Dr George Leopold

1988

Japan

Dr Hiroki Watanabe

1988

USA

Dr Marvin Ziskin

1989

Denmark

Dr Soren Hancke

1989

UK

Prof Peter Wells

1990

Germany

Dr Harald Lutz

1991

Canada

Prof Peter Burns

1998

USA

Dr Barry Goldberg

2001

Thailand

Dr Kittipong Vairojanavong

2003

Korea

Prof Byung Ihn Choi

2006

China

Dr Yu Xin Jiang

2006

Denmark

Dr Christian Nolsoe