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• The words AND, OR and NOT may confuse the search; try adding quotes: "(((((( practical guidebook to (biostatistical OR statistical) AND epidemiology. ) OR ((( practical guidebook to (((biostatistics OR (biostatistical OR statistical)) OR (biostatistical OR statistical)) OR (biostatistical OR statistical)) AND epidemiology. ) OR ( practical guidebook to (biostatistical OR statistical) AND epidemiology. ))))) OR ((((( practical guidebook to (biostatistical OR statistical) AND epidemiology. ) OR ((( practical guidebook to (((biostatistics OR (biostatistical OR statistical)) OR (biostatistical OR statistical)) OR (biostatistical OR statistical)) AND epidemiology. ) OR ( practical guidebook to (biostatistical OR statistical) AND epidemiology. ))))) OR ((( practical guide to (biostatistical OR statistical) AND epidemiology. ) OR ((((((((( practical guide to (biostatistical OR statistical) AND epidemiology. ) OR ( practical guide to (biostatistical OR statistical) AND epidemiology. ))) OR ( practical guide to (biostatistical OR statistical) AND epidemiology. ))) OR ( practical guide to (biostatistical OR statistical) AND epidemiology. ))) OR ( practical guide to (biostatistical OR statistical) AND epidemiology. ))))))))) OR ( practice guide to statistics AND epidemiology. ))~".
• Adding a wildcard symbol may retrieve word variants: (((((( practical guidebook to (biostatistical OR statistical) AND epidemiology. ) OR ((( practical guidebook to (((biostatistics OR (biostatistical OR statistical)) OR (biostatistical OR statistical)) OR (biostatistical OR statistical)) AND epidemiology. ) OR ( practical guidebook to (biostatistical OR statistical) AND epidemiology. ))))) OR ((((( practical guidebook to (biostatistical OR statistical) AND epidemiology. ) OR ((( practical guidebook to (((biostatistics OR (biostatistical OR statistical)) OR (biostatistical OR statistical)) OR (biostatistical OR statistical)) AND epidemiology. ) OR ( practical guidebook to (biostatistical OR statistical) AND epidemiology. ))))) OR ((( practical guide to (biostatistical OR statistical) AND epidemiology. ) OR ((((((((( practical guide to (biostatistical OR statistical) AND epidemiology. ) OR ( practical guide to (biostatistical OR statistical) AND epidemiology. ))) OR ( practical guide to (biostatistical OR statistical) AND epidemiology. ))) OR ( practical guide to (biostatistical OR statistical) AND epidemiology. ))) OR ( practical guide to (biostatistical OR statistical) AND epidemiology. ))))))))) OR ( practice guide to statistics AND epidemiology. ))*.