Louise Davies1, Greg Ogrinc2. 1. VA Outcomes Group, Department of Veterans, Affairs Medical Center, Vermont, USA The Dartmouth Institute for Health Policy and Clinical Practice and the Section of Otolaryngology in Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA. 2. Department of Veterans, Affairs Medical Center, Vermont, USA Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA.