title: Studying complexity is complex.
authors.forename: Jeff
authors.initials: J
authors.lastname: Whittle
authors.forename: Hayden
authors.initials: H
authors.lastname: Bosworth
mesh_terms: D002908:Chronic Disease / Q000628:therapy*; D015897:Comorbidity; D003695:Delivery of Health Care / Q000458:organization & administration*; D006302:Health Services Research; D006801:Humans; D014481:United States; D014493:United States Department of Veterans Affairs