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