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The top documents tagged [population of drug users]
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population of drug users
Epidemiologic Study Designs M. Tevfik DORAK Clinical Studies & Objective Medicine Bodrum, 15-16 April 2006.
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Choosing a reference group Louise Coole Sources: EPIET courses (from 1995 to 2011) J Stewart, A Moren.
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Epidemiological studies Two types Observation Experiment.
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Advanced course in field epidemiology Health Protection Surveillance Centre Ireland
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