1. Structural Biology Unit, NIDA IRP, National Institutes of Health, Baltimore, Maryland, United States.
2. Center for Neuroscience and Regenerative Medicine, Rockville, Maryland, United States
3. Case Western Reserve University, Cleveland, Ohio, United States
4. Uniformed Services University, Bethesda, Maryland, United States
5. U.S. Naval Hospital, San Diego, California,
United States
6. Tel Aviv University, Tel Aviv, Israel
7. Ionwerks, Inc., Houston, Texas, United States
8. University of Pittsburgh, Pittsburgh, Pennsylvania, United States