1 Department of Pediatrics, Section of Emergency Medicine, University of Colorado School of Medicine, Aurora, CO. Electronic address: [email protected].
2 Institute for Health Research, Kaiser Permanente Colorado, Aurora, CO.
3 Departments of Psychiatry, Medical Ethics and Health Policy, & Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.
4 Department of Emergency Medicine, University of Colorado School of Medicine, Aurora, CO.