1. Chemical and Biomolecular Engineering Department, Tulane University, New Orleans, Louisiana.
2. Molecular and Cellular Biology Program, Tulane Health Sciences Center, New Orleans, Louisiana.
3. Present address: Radiation Oncology Department, Johns Hopkins Medical School, Baltimore, Maryland.
4. Pathology Department, Tulane Health Sciences Center, New Orleans, Louisiana.
5. Tulane Cancer Center, Tulane Health Sciences Center, New Orleans, Louisiana.
6. Present address: Fermentation and Mammalian Cell Culture Process Development Department, Merck Research Laboratories, West Point, Pennsylvania.
7. Surgery Department, Tulane Health Sciences Center, New Orleans, Louisiana.