1. Resident in anesthesiology, mayo graduate school of medicine (university of minnesota)
2. consultant, department of anesthesiology; head, section of anesthesia research, mayo clinic and mayo foundation; associate professor of anesthesia, mayo medical school
3. Consultant, department of internal medicine, division of thoracic diseases, mayo clinic and mayo foundation; instructor in medicine, mayo medical school
4. Consultant, department of internal medicine, devision of thoracie disease; head section of thoracie research, department of internal medicine, division of thoracic diseases, mayo clinic and mayo foundation; professor of physiology and medicine, mayo medical school