RT Journal Article SR Electronic(1) A1 Rezza, G A1 Valdarchi, C A1 Puzelli, S A1 Ciotti, M A1 Farchi, F A1 Fabiani, C A1 Calzoletti, L A1 Donatelli, I A1 Perno, C F YR T1 JF VO OP UL https://www.eurosurveillance.org/content/10.2807/esm.11.10.00652-fr