Institution: | (1) Agency for Public Health, Via di S. Constanza 53, 00198 Rome, Lazio Region, Italy;(2) Sanofi Pasteur MSD, 8 rue Jonas Salk, 69007 Lyon, France;(3) National Research Council, Institute for Research on the Population and Social Policies, Via Nizza 128, 00198 Rome, Italy;(4) Centre for Disease Control, Ministry of Health, Via della Civilt? Romana 7, 00144 Rome, Italy |