Further Evidence for Bias in Observational Studies of Influenza Vaccine Effectiveness: The 2009 Influenza A(H1N1) Pandemic

The Vaccine Safety Datalink: A Model for Monitoring Immunization Safety

(2011) J. Baggs et al.   PEDIATRICS

Why do covariates defined by International Classification of Diseases codes fail to remove confounding in pharmacoepidemiologic studies among seniors?

(2011) Michael L. Jackson et al.   PHARMACOEPIDEMIOLOGY AND DRUG SAFETY

Influenza Vaccine Effectiveness in the Elderly Based on Administrative Databases: Change in Immunization Habit as a Marker for Bias

(2011) Travis S. Hottes et al.   PLoS One

Influenza vaccination and all-cause mortality in community-dwelling elderly in Ontario, Canada, a cohort study

(2010) Michael A. Campitelli et al.   VACCINE

Influenza Vaccination and Mortality: Differentiating Vaccine Effects From Bias

(2009) Bruce Fireman et al.   AMERICAN JOURNAL OF EPIDEMIOLOGY

Evidence of Bias in Studies of Influenza Vaccine Effectiveness in Elderly Patients

(2009) Roger Baxter et al.   JOURNAL OF INFECTIOUS DISEASES

Cross-Reactive Antibody Responses to the 2009 Pandemic H1N1 Influenza Virus

(2009) Kathy Hancock et al.   NEW ENGLAND JOURNAL OF MEDICINE

Challenges in evaluating influenza vaccine effectiveness and the mortality benefits controversy

(2009) Kristin L. Nichol   VACCINE

Influenza vaccination and risk of community-acquired pneumonia in immunocompetent elderly people: a population-based, nested case-control study

(2008) Michael L Jackson et al.   LANCET