1. Chairman, Department of Pathology, Médica Sur Clinic and Foundation, Professor of Oncologic Pathology, National Autonomous University of Mexico School of Medicine, Mexico City, Mexico
2. Clinical Professor of Pathology, The George Washington University School of Medicine, Washington, DC
3. Attending Pathologist and Chairman, Department of Pathology, James Ewing Alumni Chair in Pathology, Memorial Sloan Kettering Cancer Center, Professor of Pathology and Laboratory Medicine, Weill Medical College of Cornell University, New York, NY