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• Performing a fuzzy search may retrieve terms with similar spellings: \ ((((\\ practical guide to ((biostatistics OR statistics) OR ((biostatistics OR statistics) OR (biostatistics OR statistics))) AND epidemiology.\\ ) OR (\\ practical guide to ((biostatistics OR statistics) OR ((biostatistics OR statistics) OR (biostatistics OR statistics))) AND epidemiology.\\ ))) OR (\\ practice guide to statistical AND epidemiology.\\ ))*\~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "\ ((((\\ practical guide to ((biostatistics OR statistics) OR ((biostatistics OR statistics) OR (biostatistics OR statistics))) AND epidemiology.\\ ) OR (\\ practical guide to ((biostatistics OR statistics) OR ((biostatistics OR statistics) OR (biostatistics OR statistics))) AND epidemiology.\\ ))) OR (\\ practice guide to statistical AND epidemiology.\\ ))*\*".