Sakai, Emiko IgG3 deficiency and severity of 2009 pandemic H1N1 influenza. [electronic resource] - Pediatrics international : official journal of the Japan Pediatric Society Dec 2012 - 758-61 p. digital Publication Type: Comparative Study; Journal Article ISSN: 1442-200X Standard No.: 10.1111/j.1442-200X.2012.03691.x doi Subjects--Topical Terms: AdolescentAsthma--epidemiologyChildChild, PreschoolFemaleFollow-Up StudiesHumansIgG Deficiency--complicationsIncidenceInfluenza A Virus, H1N1 SubtypeInfluenza, Human--complicationsJapan--epidemiologyMalePandemicsPneumonia, Viral--epidemiologyRetrospective StudiesSeverity of Illness IndexSurvival Rate--trends