Correction to: Journal of Exposure Science and Environmental Epidemiology (2007) 17: XXX–XXX; advanced online publication, 11 April 2007; doi:10.1038/sj.jes.7500571

Table 1 was published with errors. It is printed here correctly in its entirety. The publisher regrets for the error.

Table 1 Descriptive statistics and associations between ambient NO2 concentrations at 68 measurement sites and land-use variables in Rome 1995–1996 by simple univariate linear regression models.