title: Risk factors for disease severity among hospitalised patients with 2009 pandemic influenza A (H1N1) in Spain, April - December 2009.
authors.affiliation: Ministerio de Sanidad y Política Social (Ministry of Health and Social Policy), Madrid, Spain. psantaolalla@msps.es
authors.forename: P
authors.initials: P
authors.lastname: Santa-Olalla Peralta
authors.forename: M
authors.initials: M
authors.lastname: Cortes-García
authors.forename: M
authors.initials: M
authors.lastname: Vicente-Herrero
authors.forename: C
authors.initials: C
authors.lastname: Castrillo-Villamandos
authors.forename: P
authors.initials: P
authors.lastname: Arias-Bohigas
authors.forename: I
authors.initials: I
authors.lastname: Pachon-del Amo
authors.forename: M J
authors.initials: MJ
authors.lastname: Sierra-Moros