title: The authors reply.
authors.affiliation: Department of Emergency Medicine, Denver Health Medical Center, Denver, CO, and Department of Emergency Medicine, University of Colorado School of Medicine, Aurora, CO.
authors.forename: Jody A
authors.initials: JA
authors.lastname: Vogel
authors.forename: John
authors.initials: J
authors.lastname: Kendall
mesh_terms: D002405:Catheterization, Central Venous / Q000379:methods*; D006801:Humans; D007601:Jugular Veins / Q000000981:diagnostic imaging*; D013350:Subclavian Vein / Q000000981:diagnostic imaging*; D014463:Ultrasonography