1. Alcon Research, Ltd., Fort Worth, Texas.
2. Sall Eye Research Medical Center, Bell Flower, California.
3. Eye Care Centers Management, Inc., Clayton Eye Center, Morrow, Georgia.
4. University of Texas Southwestern Medical Center at Dallas, Dallas, Texas.
5. Wills Eye Hospital, Philadelphia, Pennsylvania.
6. Private Practice, Glaucoma Consultants of Colorado, Littleton, Colorado.