1 Emotion and Pain Laboratory, San Francisco Veterans Affairs Health Care Center, San Francisco, CA.
2 Department of Psychiatry, University of California San Francisco, San Francisco, CA.
3 School of Clinical Dentistry, University of Sheffield, United Kingdom.
4 San Diego Veterans Affairs Health Care Center, San Diego, CA.
5 Department of Psychiatry, University of California San Diego, San Diego, CA.
6 International Center for Primate Brain Research, Center for Excellence in Brain Science and Intelligence, Institute of Neuroscience, Chinese Academy of Sciences, Shanghai, China.
7 Nathan S. Kline Institute for Psychiatric Research, Orangeburg, NY, United States.
8 Werner Reichardt Center for Integrative Neuroscience, Karl Eberhard University of Tübingen, Tübingen, Germany.
9 Max Planck Institute for Biological Cybernetics, Tübingen, Germany.
10 Division of Neurobiology, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden.
11 Department of Physiology, University of Toronto, Toronto, ON, Canada.