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- 01/01/2004
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- Publication date
- 01/01/1991
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- Publication date
- 01/01/1990
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- Publication date
- 01/01/1995
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- Publication date
- 01/01/2000
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- 'S. Karger AG'
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- 01/01/1994
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- Publication date
- 01/01/1995
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- Publication date
- 01/01/1987
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- Publication date
- 01/01/1982
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