1. Department of Neural and Pain Sciences, School of Dentistry, University of Maryland, Baltimore, MD, USA
2. Department of Anesthesiology, Wake Forest School of Medicine, Winston-Salem, NC, USA
3. Universidad Autónoma de Tamaulipas, Reynosa, Tamaulipas, Mexico
4. FM James III Professor of Anesthesiology and Physiology and Pharmacology, Wake Forest School of Medicine, Winston-Salem, NC, USA