F Chirico1, N Magnavita2. 1. Post-graduate School of Occupational Health, Occupational Unit of the Department of Woman/Child and Public Health, Università Cattolica del Sacro Cuore, Largo F. Vito 1, 00168, Roma, Italy. francesco.chirico@unicatt.it. 2. Post-graduate School of Occupational Health, Department of Woman/Child and Public Health, Università Cattolica del Sacro Cuore. Fondazione Policlino "A Gemelli", IRCSS, Largo F. Vito 1, 00168, Rome, Italy.