Figure 1From: The relation between amyotrophic lateral sclerosis and inorganic selenium in drinking water: a population-based case-control study Map of the Reggio Emilia municipality, northern Italy (extension 231.6 km 2 , population 169,223 at September 30, 2010), showing the locations where ALS cases and controls consumed high-Se drinking water in the 1995-2006 period.Back to article page