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