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- 01/05/1980
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- 01/07/1969
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- 01/10/1972
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- 01/10/1976
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- 08/12/1973
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- BMJ Group
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- BMJ Group
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- Publication date
- 03/03/1984
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- 31/05/1986
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- Publication date
- 01/03/1984
- Field of study
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