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

• If you are trying to use Boolean operators, they must be ALL CAPS: \ ((\ ((practical guidebook) OR (practical guide)) to (biostatistical OR (biostatistics OR statistics)) AND epidemiology.\\ ) OR (\ practice guide to statistical AND epidemiology.\\ ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "\ ((\ ((practical guidebook) OR (practical guide)) to (biostatistical OR (biostatistics OR statistics)) and epidemiology.\\ ) OR (\ practice guide to statistical and epidemiology.\\ ))~".
• Adding a wildcard symbol may retrieve word variants: \ ((\ ((practical guidebook) OR (practical guide)) to (biostatistical OR (biostatistics OR statistics)) and epidemiology.\\ ) OR (\ practice guide to statistical and epidemiology.\\ ))*.