1. Department of Otolaryngology–Head and Neck Surgery, University of California, San Francisco, California.
2. California Pacific Medical Center Research Institute, San Francisco, California.
3. Heinrich-Heine-Universität Düsseldorf, Institut für Genetik, Düsseldorf, Germany.
4. Department of Laboratory Medicine; Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research; Helen Diller Family Comprehensive Cancer Center; and Institute for Human Genetics, University of California, San Francisco, California.
5. Department of Medicine, University of Vermont, Burlington, Vermont.