1. Department of Physiology; Meharry Medical College; Nashville; Tennessee; 37208
2. Department of Neuroscience; University of Florida; Gainesville; Florida; 323611
3. Department of Pharmacology, Toxicology, and Neuroscience; Louisiana State university Health Sciences Center; Shreveport; Louisiana; 71130
4. Department of Psychiatry; Vanderbilt University; Nashville; Tennessee; 37209
5. Aegis Sciences Corporation; Nashville; Tennessee; 37228