You may be able to get more results by adjusting your search query.

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