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ObjectivesTo describe the clinical presentation and prognosis of elderly adults hospitalized with pandemic 2009 A(H1N1) influenza infection and to compare these data with those of younger patients.
DesignProspective, observational, multicenter study.
SettingThirteen hospitals in Spain.
ParticipantsAdults admitted to the hospital with confirmed pandemic 2009 A(H1N1) influenza infection.
MeasurementsDemographic,...
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