Affiliation: | aThe University of Michigan, 1904 Taubman Center, 1500 E Medical Center Dr., Ann Arbor MI 48109, 734-936-7633;bVA Ann Arbor Healthcare System and Center for Practice Management and Outcomes, Research, Ann Arbor, MI;cDepartment of Otolaryngology–Head and Neck Surgery, The University of Michigan, Ann Arbor, MI |