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• The words AND, OR and NOT may confuse the search; try adding quotes: "\ \\ \\\ ((((\\\\ practical guidebook to ((((biostatistical OR statistical) OR biostatistics) OR ((biostatistical OR statistical) OR biostatistics)) OR (((biostatistical OR statistical) OR biostatistics) OR ((biostatistical OR statistical) OR biostatistics))) AND epidemiology.\\\\ ) OR (((\\\\ practical guidebook to ((((biostatistical OR statistical) OR biostatistics) OR ((biostatistical OR statistical) OR biostatistics)) OR (((biostatistical OR statistical) OR biostatistics) OR ((biostatistical OR statistical) OR biostatistics))) AND epidemiology.\\\\ ) OR (((\\\\ practical guide to (((biostatistical OR statistical) OR biostatistics) OR ((biostatistical OR statistical) OR biostatistics)) AND epidemiology.\\\\ ) OR (\\\\ practical guide to (((biostatistical OR statistical) OR biostatistics) OR ((biostatistical OR statistical) OR biostatistics)) AND epidemiology.\\\\ ))))))) OR (\\\\ practice guide to statistics AND epidemiology.\\\\ ))~\\\ \\ \".
• Adding a wildcard symbol may retrieve word variants: \ \\ \\\ ((((\\\\ practical guidebook to ((((biostatistical OR statistical) OR biostatistics) OR ((biostatistical OR statistical) OR biostatistics)) OR (((biostatistical OR statistical) OR biostatistics) OR ((biostatistical OR statistical) OR biostatistics))) AND epidemiology.\\\\ ) OR (((\\\\ practical guidebook to ((((biostatistical OR statistical) OR biostatistics) OR ((biostatistical OR statistical) OR biostatistics)) OR (((biostatistical OR statistical) OR biostatistics) OR ((biostatistical OR statistical) OR biostatistics))) AND epidemiology.\\\\ ) OR (((\\\\ practical guide to (((biostatistical OR statistical) OR biostatistics) OR ((biostatistical OR statistical) OR biostatistics)) AND epidemiology.\\\\ ) OR (\\\\ practical guide to (((biostatistical OR statistical) OR biostatistics) OR ((biostatistical OR statistical) OR biostatistics)) AND epidemiology.\\\\ ))))))) OR (\\\\ practice guide to statistics AND epidemiology.\\\\ ))~\\\ \\ \*.