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