You may be able to get more results by adjusting your search query.

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