RT Journal Article SR Electronic(1) A1 Sendra Gutierrez, J M A1 Martin Rios, D A1 Casas, I A1 Sáez, P A1 Tovar, A A1 Moreno, C YR T1 JF VO OP UL https://www.eurosurveillance.org/content/10.2807/esm.09.03.00453-pt