title: A difference is a difference if it makes a difference.
authors.affiliation: Department of Public Health Sciences, School of Medicine, Charlottesville, VA. Electronic address: ded2x@eservices.virginia.edu.
authors.forename: Don Eugene
authors.initials: DE
authors.lastname: Detmer
authors.affiliation: University of Virginia Center for Telehealth, University of Virginia, Charlottesville, VA.
authors.forename: Karen S
authors.initials: KS
authors.lastname: Rheuban
mesh_terms: D003422:Critical Care / Q000191:economics*; D006801:Humans; D017216:Telemedicine / Q000191:economics*