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