1. From the Health Partners Medical Group, Minneapolis, Minnesota;
2. the Tokyo Dental College, Chiba, Japan;
3. Unidad Superficie Ocular, Hospital Clinico San Carlos, Madrid, Spain;
4. the Department of Ophthalmology, University of Auckland, Auckland, New Zealand;
5. the Department of Ophthalmology, The University of Texas Southwestern Medical Center, Dallas, Texas; and
6. Department of Ophthalmology and Visual Science, The Kentucky Lions Eye Center, University of Louisville, Louisville, Kentucky.