1. Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati College of Medicine, Cincinnati, OH, USA;
2. Institute of Infection and Immunity, Cardiff University School of Medicine, Cardiff, UK;
3. Department of Anesthesiology, University of Michigan, Ann Arbor, MI, USA;
4. Tokyo Rheumatism Pain Clinic, Tokyo, Japan;
5. Pfizer Inc., New York, NY, USA;
6. Pfizer Inc., Groton, CT, USA