EPB%20PHC%206000%20EPIDEMIOLOGY%20%20FALL,%201997 - PowerPoint PPT Presentation

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EPB%20PHC%206000%20EPIDEMIOLOGY%20%20FALL,%201997

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... cohort ('follow-up' ... At 2-year intervals, follow-up questionnaires were completed on ... Probability of loss to follow-up may be related to exposure, ... – PowerPoint PPT presentation

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