1. University Hospitals Case Medical Center, Case Western Reserve University, Cleveland, Ohio.
2. Claghorn Lesem Research Clinic Ltd., Houston, Texas.
3. The Vermont Clinical Center and Dartmouth Medical College, Burlington, Vermont.
4. Elite Clinical Trials, Inc., Temecula, California.
5. Shire Development, Inc., Wayne, Pennsylvania. Dr. Li is now at Cereta, Inc., Oakland, California.