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• The words AND, OR and NOT may confuse the search; try adding quotes: "\ \\ \\\ \\\\ \\\\\ ((\\\\\\ practical guidebook to ((((biostatistical OR biostatistical) OR (biostatistical OR biostatistical)) OR ((biostatistical OR biostatistical) OR (biostatistical OR biostatistical))) OR ((biostatistical OR biostatistical) OR (biostatistical OR biostatistical))) AND epidemiology.\\\\\\ ) OR (((\\\\\\ practical guide to statistical AND epidemiology.\\\\\\ ) OR (\\\\\\ practice guide to statistical AND epidemiology.\\\\\\ ))))~\\\\\ \\\\ \\\ \\*".