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