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 guidebook to biostatistics AND epidemiology.\\\") OR (\\\"practical guidebook to biostatistics AND epidemiology.\\\"))) OR (\\\"practical guidebook to biostatistics AND epidemiology.\\\"))) OR (\\\"practical guide to (statistics OR statistical) AND epidemiology.\\\"))~\\"\"".
• Removing quotes may allow a broader search: ((((((\ practical guidebook to biostatistics AND epidemiology.\ ) OR (\ practical guidebook to biostatistics AND epidemiology.\ ))) OR (\ practical guidebook to biostatistics AND epidemiology.\ ))) OR (\ practical guide to (statistics OR statistical) AND epidemiology.\ ))~.