Erratum to: Intern Emerg Med DOI 10.1007/s11739-011-0624-5

Unfortunately, first and last name of each author has been swapped in the original version of the article.

The correct author group is listed below:

Carmelita Marcantoni, Stefania Rastelli, Luca Zanoli, Giovanni Tripepi, Marilena Di Salvo, Sergio Monaco, Carmelo Sgroi, Davide Capodanno, Corrado Tamburino, Pietro Castellino.