| http://www.w3.org/ns/prov#value | - We assessed whether obesity is a risk factor for hospitalization and death due to 2009 pandemic influenza A(H1N1), independent of chronic medical conditions considered by the Advisory Committee on Immunization Practices (ACIP) to increase the risk of influenza-related complications.Methodology/Principal FindingsWe used a case-cohort design to compare cases of hospitalizations and deaths from 2009
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