1. The Skaggs Institute for Chemical Biology and Department of Chemical
Physiology, The Scripps Research Institute, La Jolla, California 92037, United States
2. Committee of Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, California
92037, United States
3. Arthritis
Research UK Pain Centre, University of Nottingham, School of Biomedical Sciences, Queen’s Medical Centre, Nottingham
NG7 2UH, United Kingdom