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) AND epidemiology.\\ ) OR (\\ practice guidebook to (biostatistical OR statistical) AND epidemiology.\\ ))) 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) and epidemiology.\\ ) OR (\\ practice guidebook to (biostatistical OR statistical) and epidemiology.\\ ))) OR (\\ practical guide to statistics and epidemiology.\\ ))~\".
• Adding a wildcard symbol may retrieve word variants: \ ((((\\ practical guidebook to (biostatistical OR statistical) and epidemiology.\\ ) OR (\\ practice guidebook to (biostatistical OR statistical) and epidemiology.\\ ))) OR (\\ practical guide to statistics and epidemiology.\\ ))~\*.