1. Visiting Scholar/Postdoctoral Research Fellow, Department of Anesthesiology, University of Virginia; Department of Anesthesiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Suwon, South Korea.
2. Postdoctoral Research Fellow.
3. Visiting Scholar/Postdoctoral Research Fellow, Department of Anesthesiology, University of Virginia; Department of Internal Medicine, Kangwon National University Hospital, Kangwon National University, Kangwon, South Korea.
4. Robert M. Epstein Professor, Department of Anesthesiology, University of Virginia.