Visiting Professor in Oncology, Department of Oncology of McGill University and RICUM of the University of Montreal, Montreal, Quebec, May 17-18, 1994.
The Doctors Kienle Visiting Professor, Penn State Milton S. Hershey Medical Center, Hershey, Pennsylvania, January 11-13, 1993.
The Bruce Hubbard Stewart Visiting Scholar, The Cleveland Clinic Foundation, Cleveland, Ohio, April 9-10, 1992.
The Morton Binder Visiting Professor, Washington University School of Medicine, St. Louis, Missouri, March 18-19, 1992.
Visiting Professor, Mayo Clinic, Rochester, Minnesota, December 12-14, 1990.
Meyerowitz Visiting Professorship, Department of Psychiatry, Division of Behavioral and Psychosocial Medicine, Rochester, New York, April 4-5, 1990.
Visiting Professor, University of Michigan Medical School, Ann Arbor, Michigan, May 21-23, 1986.
Visiting Professor, University of Washington School of Medicine, Seattle, Washington, March 2-5, 1986.
Visiting Professor, Division of General Internal Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, November 14-15, 1985.
Visiting Scholar, Center for Ethics, Medicine, and Public Issues, Baylor College of Medicine, Houston, Texas, December 7-8, 1983.
Visiting Professor, Postgraduate Committee of Medicine of the Australian National University, Sydney, Australia, August 1983.
Visiting Professor, The University of Newcastle Medical School, Sydney, Australia, August 1983.
Visiting Professor, Department of Community Medicine, The University of Sydney, Sydney, Australia, August 1983.
Distinguished Visiting Medical Scholar, Institute of Religion and Baylor College of Medicine, Houston, Texas, October-November 1978.