1 University of Michigan Medical School, Ann Arbor, MI.
2 Department of Otolaryngology, University of Michigan, Ann Arbor, MI; Center for Bioethics and Social Sciences in Medicine, University of Michigan, Ann Arbor, MI.
3 Department of Radiation Oncology, University of Michigan, Ann Arbor, MI; Center for Bioethics and Social Sciences in Medicine, University of Michigan, Ann Arbor, MI.
4 Department of General Surgery, University of Michigan, Ann Arbor, MI; Center for Bioethics and Social Sciences in Medicine, University of Michigan, Ann Arbor, MI. Electronic address: [email protected].