1Department of Orthodontics, Comprehensive Center for Pain Research, McKnight Brain Institute, University of Florida, 1600 S.W. Archer Road, Rm D10–19, P.O. Box 100444, Gainesville, FL 32610, USA
2Department of Neuroscience, University of Florida, 1600 S.W. Archer Road, Gainesville, FL 32610, USA
3Department of Preventive Sciences, University of Minnesota, Minneapolis, MN, USA
4Department of Psychiatry, University of Minnesota, Minneapolis, MN USA
5Department of Neuroscience, University of Minnesota, Minneapolis, MN, USA
6Advanced Targeting Systems, San Diego, CA, USA