1. Alkermes, Inc., Cambridge, MA 02139.
2. Department of Basic Sciences, University of Colorado School of Dentistry, Denver, CO 80262.
3. Department of Cell Biology, University of Linkoping Health Science Center, Linkoping, Sweden.
4. Department of Pharmacology, University of Colorado School of Medicine, Denver, CO 80262.
5. Department of Neuropharmacology, Scripps Clinic and Research Foundation, La Jolla, CA 92037.