The Surveillance of Hospitalized Cases of Severe Influenza in Catalonia Working Group is composed of: Alsedà M, Álvarez J, Arias C, Balañà PJ, Barrabeig I, Camps N, Carol M, Ferràs J, Ferrús G, Follia N, Godoy P, Bach P, Jané M, Martínez A, Minguell S, Parrón I, Plasència E, Sala-Farré MR, Torner N, Torra R, Torres J (Public Health Agency of Catalonia); Caylà J, Gorrindo P, Rius C (Public Health Agency of Barcelona); Marcos MA, Mosquera MDM, Vilella A (H Clínic, Barcelona); Antón A, Pumarola T, Campins M (H Universitari Vall d'Hebrón, Barcelona); García D (H Josep Trueta, Girona); Espejo E (H Terrassa); Freixas N, Riera Garcia M (Mútua Terrassa); Maraver E, Mas D, Perez R, (H Altahia Manresa); Rebull J (H.Verge de la Cinta, Tortosa); Pou J (H Sant Joan de Déu, Esplugues); García-Pardo G, Olona M (H Joan XXIII, Tarragona); Barcenilla F, Castellana D (H Arnau de Vilanova, Lleida) Navarro-Rubio G (Consorci Sanitari Parc Taulí, Sabadell); Force LL (H Mataró).
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