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1999 London, UK
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1998 Jerusalem, Israel
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1996 Toulouse, France
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1995 Rotterdam, Netherlands
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1993 Barcelona, Spain
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1991 Geneva, Switzerland
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1990 Berlin, Germany
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1989 Siena, Italy
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1988 Tuczno, Poland
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1987 Paris, France
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1986 London, UK
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1985 Belfast, UK
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1983 Cologne, Germany