You may be able to get more results by adjusting your search query.

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