title: The Veterans Affairs Healthcare System: A unique laboratory for observational and interventional research.
authors.affiliation: Veterans Aging Cohort Study Center, Yale University School of Medicine, New Haven, CT 06516, USA. amy.justice2@va.gov
authors.forename: Amy C
authors.initials: AC
authors.lastname: Justice
authors.forename: Joseph
authors.initials: J
authors.lastname: Erdos
authors.forename: Cynthia
authors.initials: C
authors.lastname: Brandt
authors.forename: Joseph
authors.initials: J
authors.lastname: Conigliaro
authors.forename: William
authors.initials: W
authors.lastname: Tierney
authors.forename: Kendall
authors.initials: K
authors.lastname: Bryant
mesh_terms: D035843:Biomedical Research; D003695:Delivery of Health Care / Q000458:organization & administration*; D019317:Evidence-Based Medicine; D006801:Humans; D016347:Medical Records Systems, Computerized; D014481:United States; D014493:United States Department of Veterans Affairs