1. From the Departments of Ophthalmology and
2. Department of Anatomy and Embryology II, Faculty of Medicine, Complutense University, Madrid, Spain;
3. Department of Anatomy, Akita University School of Medicine, Akita, Japan; and
4. Division of Internal Medicine, Iwamizawa Kojin-kai Hospital, Iwamizawa, Japan.
5. Anatomy, Sapporo Medical University School of Medicine, Sapporo, Japan;