1. Associate in Anesthesia, Department of Anesthesia, University of Iowa Hospitals and Clinics.
2. Research Fellow, Department of Anesthesia, University of Iowa Hospitals and Clinics.
3. Research Fellow, Department of Anesthesia, University of Iowa Hospitals and Clinics. Current address: Department of Anaesthesia, University of Toronto, Toronto Western Hospital, Toronto, Ontario.
4. Chief Perfusionist, Division of Cardiothoracic Surgery, Department of Surgery, University of Iowa Hospitals and Clinics.
5. Professor, Department of Anesthesia, University of Iowa Hospitals and Clinics.
6. Professor and Head, Department of Anesthesia, University of Iowa Hospitals and Clinics.