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