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