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