Authors: Carla Perria; Donatella Mandolini; Carmelina Guerrera; Tom Jefferson; Paolo Billi; Virgilio Calzini; Alfonso Fiorillo; Giuseppe Grasso; Sergio Leotta; Walter Marrocco; Concetta Suraci; Amina Pasquarella Journal: BMC Health Serv Res Date: 2007-06-04 Impact factor: 2.655