1. From the Laboratory of Experimental Organogenesis, Ho^pital du Saint-Sacrement du CHA,2Departments of Oto-Rhino-Laryngology and Ophthalmology,3Surgery, and
2. From the Laboratory of Experimental Organogenesis, Ho^pital du Saint-Sacrement du CHA,4School of Optometry, Research Unit in Ophthalmology, Montreal University, Que´bec, Canada; and the
3. Departments of Oto-Rhino-Laryngology and Ophthalmology,5Anatomy and Physiology, Laval University, Que´bec, Canada; the6Oncology and Molecular Endocrinology Research Center, University Hospital Center of Laval Research Center, Que´bec, Canada.