1. Department of Anesthesiology and Perioperative Medicine, Penn State College of Medicine, Hershey, Pennsylvania
2. Penn State College of Medicine, Hershey, Pennsylvania
3. Department of Public Health Sciences, Penn State College of Medicine, Hershey, Pennsylvania
4. Departments of Public Health Sciences and Biochemistry & Molecular Biology, Penn State College of Medicine, Hershey, Pennsylvania
5. Departments of Anesthesiology and Critical Care Medicine, Physical Medicine & Rehabilitation, Neurology, and Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, Maryland
6. Departments of Anesthesiology and Physical Medicine & Rehabilitation, Walter Reed National Military Medical Center, Uniformed Services University of the Health Sciences, Bethesda, Maryland