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• Performing a fuzzy search may retrieve terms with similar spellings: \ ((\ practical guide to ((biostatistical OR (biostatistics OR statistics)) OR (biostatistical 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 ((biostatistical OR (biostatistics OR statistics)) OR (biostatistical OR (biostatistics OR statistics))) AND epidemiology.\\ ) OR (\ practice guide to statistical AND epidemiology.\\ ))*\".
• Adding a wildcard symbol may retrieve word variants: \ ((\ practical guide to ((biostatistical OR (biostatistics OR statistics)) OR (biostatistical OR (biostatistics OR statistics))) AND epidemiology.\\ ) OR (\ practice guide to statistical AND epidemiology.\\ ))*\*.