1. Department of Otolaryngology-Head and Neck Surgery; Washington University School of Medicine in St. Louis; St. Louis Missouri U.S.A.
2. Department of Ophthalmology and Visual Sciences; Washington University School of Medicine in St. Louis; St. Louis Missouri U.S.A.
3. Bernard Becker Medical Library ; Washington University School of Medicine in St. Louis; St. Louis Missouri U.S.A.