Invited Seminars and Lectures, Presentations at Scientific Meetings (1991-1999) 
  1. "Pathophysiology of Liver Allograft Rejection," Hans Popper Hepatopathology Society, Chicago, IL, March 17, 1991.
  2. "Viral Liver Disease After Hepatic Transplantation," Liver Biopsy Interpretation for the 1990's - Clinicopathologic Correlations in Liver Disease, AASLD Postgraduate Course, Chicago, IL, November 3, 1991.
  3. "Detection of Viral Genes and Antigens in Liver Tissue" and "Meet the Professor Luncheon," American Association for the Study of Liver Disease, Chicago, IL, November 3, 1991.
  4. "Pathology of Liver Transplantation," The National Tumor Institute of Milan, Milan, Italy, November 7, 1991.
  5. "Pathobiology of Small Intestinal Transplantation," University of Milan, Milan, Italy, November 8, 1991.
  6. "Pathobiology of Human Small Intestinal Transplantation," Baylor University Medical Center, Dallas, TX, February, 1992.
  7. "Diagnosis of Recurrence of Hepatitis B and C After Liver Transplantation" and "Diagnosis of Early Liver Graft Dysfunction: Preservation or Immunological Injury," II International Course on Hepato-Pancreato-Biliary Surgery and Organ Transplantation, Barcelona, Spain, April 27-29, 1992.
  8. "Histologic Diagnosis of Liver Transplant Rejection," Japanese Society of Pediatric Surgeons, Sapporo, Japan, June 10-12, 1992.
  9. "Pathophysiologic Studies of Human to Baboon Liver Xenografting," Consortium for Clinical Xenotransplantation Workshop, Columbia University, New York, NY, September 11, 1992.
  10. "Acute Allograft Rejection: Pathology and Immunology," III Congress of the Brazilian Organ Transplant Association, Sao Paulo, Brazil, December 4, 1992.
  11. "Viral Infections After Transplantation," III Congress of the Brazilian Organ Transplant Association, Sao Paulo, Brazil, December 5, 1992.
  12. "Mechanisms of Chronic Rejection," III Congress of the Brazilian Organ Transplant Association, Sao Paulo, Brazil, December 6, 1992.
  13. "Lymphocyte Migration and Chimerism After Solid Organ Transplantation," Department of Molecular Genetics and Biochemistry, University of Pittsburgh, Pittsburgh, PA, January 29, 1993.
  14. "Cytokine stimulation of biliary epithelial cells," Experimental Liver Transplantation, Frankfurt, Germany, April 28-30, 1993.
  15. "Hematolymphoid Cell Trafficking After Liver, Bone Marrow, and Heart Transplantation: Merging of Immune Systems," Experimental Liver Transplantation, Frankfurt, Germany, April 28-30, 1993.
  16. "The Role of Donor Cells in Tolerance to Liver Allografts," Twenty-Fifth International Conference on Transplantation and Clinical Immunology, Lyon, France, May 24-26, 1993.
  17. "Hematolymphoid Cell Trafficking and Sustained Chimerism After Liver and Bone Marrow Transplantation: The Merging of Immune Systems," 83rd Annual Meeting of the United States and Canadian Academy of Pathology, Inc., San Francisco, CA, March 12-18, 1994.
  18. "Pittsburgh Experience with Clinical Xenotransplantation," European College of Transplantation, Hesperis Course, Brussels, Belgium, May 7-12, 1994.
  19. The Cellular Basis of Graft Acceptance," European College of Transplantation, Hesperis Course, Brussels, Belgium, May 7-12, 1994.
  20. "Passenger Leukocytes As Initiators of Rejection and Tolerance After Solid Organ Transplantation," Necker's Seminars in Nephrology, Paris, France, May 9-11, 1994.
  21. "Terminology for Hepatic Allograft Rejection," World Congresses of Gastroenterology Conference, Los Angeles, CA, October 2-7, 1994.
  22. "Deciphering the Alphabet Soup of Viral Hepatitis: A B C D E F(?)," RLA Seminar, Pittsburgh, PA, October 8, 1994.
  23. "Chimerism Tolerance and Autoimmunity: Are They Related?", Topics of Transplantation Fall Symposium, Baylor University Medical Center, Dallas Texas, November 15, 1994.
  24. Moderator, Liver Specialty Conference, United States and Canadian Academy of Pathology, Inc., Conference, Toronto, Ontario, Canada, March 11-17, 1995.
  25. "Histopathology of Hepatitis B After Liver Transplantation," AASLD Single Topic Symposium, Reston, VA, March 24-26, 1995.
  26. "Hematolymphoid Microchimerism, Quilty Lesions and Chronic Cardiac Allograft Rejection," ISHLT 15th Annual Meeting and Scientific Sessions, San Francisco, CA, April 5-8, 1995.
  27. LTD Steering Committee Meeting, San Francisco, CA, April 6-7, 1995.
  28. "Pathological Findings in Transplant Patients," Hepatology and Liver Transplant 1995, Pittsburgh, PA, April 8, 1995.
  29. Chairman, Liver Panel, Third Banff Conference on Allograft Pathology, Tunnel Mountain, Banff, Canada, July 21-24, 1995.
  30. "Transplantation - Related Immune Cholangitis," Jurgen Ludwig Symposium on Biliary Disorders, Recent Advances in Cholangitis, Mayo Medical Laboratories, Rochester, MN, September 16-17, 1995.
  31. Panelist, "Pre-Clinical Models and Clinical Attempts at Tolerance Induction," Tolerance: From Bench to Bedside, Boston, MA, September 26-27, 1995.
  32. Co-Chair, Lecture Session I, Fourth International Symposium on Small Bowel Transplantation and Nursing Forum on Small Bowel Transplantation, Pittsburgh, PA, OCtober 15-17, 1995.
  33. Case Presentation, Pittsburgh Pathology Society Mini Symposiium, University of Pittsburgh Medical Center, Pittsburgh, PA, February 21, 1996.
  34. "Heart Allograft Pathology Under Tacrolimus Immunosuppression," International Society for Heart and Lung Transplantation, New York, NY, March 15-18, 1996.
  35. Moderator, Liver Specialty Conference, United States and Canadian Academy of Pathology, Inc., Washington, DC, March 23-29, 1996.
  36. "Vanishing Bile Duct Syndrome and Liver Transplant Rejection," International Falk Workshop on Vanishing Bile Duct Syndrome, Spoleto, Italy, May 30-June 1, 1996.
  37. "The Pathology of Hepatic Transplantation: A Practical Perspective," University of Kentucky, Lexington, KY, June 14, 1996.
  38. "Biliary Immunopathology in Acute and Chronic Liver Disease," University of Kentucky, Lexington, KY, June 15, 1996.
  39. "The Immunobiology of Hepatic Transplantation," Japanese Society of Liver Transplantation, Otsu, Japan, July 23-28, 1996.
  40. "Histopathology of Hepatic Transplantation - Practical Aspects," Japanese Society of Liver Transplantation, Otsu, Japan, July 23-28, 1996.
  41. "Microchimerism Is Needed for Allograft Tolerance," XVI International Congress of the Transplantation Society, Barcelona, Spain, August 25-30, 1996.
  42. "Chronic Rejection in Heart Transplantation," American Society for Histocompatibility and Immunogenetics, 22nd Meeting, San Diego, CA, October 11-15, 1996.
  43. "Pathology of Hepatic Allograft Rejection," XXL International Congress of the International Academy of Pathology & 12th World Congress of Academic and Environmental Pathology, Budapest, Hungary, October 20-25, 1996.
  44. "Diseases of the Bile Duct: Pathogenesis, Pathology and Practice," American Association for the Study of Liver Diseases, Chicago, IL, November 8-9, 1996.
  45. "The Immunolymphatic Theory of Chronic Rejection," The Sixth International Alexis Carrel Conference, Banff, Alberta, Canada, December 4-7, 1996.
  46. "Reliability of the Histopathological Diagnosis of Chronic Rejection: Results of An Inter-institutional Study," Fourth Annual Banff Conference on Allograft Pathology, Banff, Alberta, Canada, March 7-12, 1997.
  47. "Responses of Biliary Epithelium to Hepatic Injury," Pathology Grand Rounds, Medical College of Virginia, Richmond, VA, April 4, 1997.
  48. "Histopathology of Post-Transplant Complications," Thomas E. Starzl Transplant Institute Conference, University of Pittsburgh Medical Center, Pittsburgh, PA, May 23, 1997.
  49. "Hepatic Response to Injury in IL-6 Deficient Mice," Annual Meeting on Hepatic Stem Cells, National Institutes of Health, Bethesda, MD, December 11-12, 1997.
  50. "The Pathology of Chronic Allograft Rejection," American Society of Transplant Physicians Second Annual Winter Symposium, San Juan, Puerto Rico, January 15-18, 1998.
  51. "Biliary Growth Regulation and Immunopathology," Falk Workshop on Normal and Malignant Cell Growth, Halle, Germany, January 29-30, 1998.
  52. "The Immunobiology of Liver Transplantation, Including the Concept of Chimerism"; "The Diagnosis, Grading and Differential Diagnosis for Acute Liver Allograft Rejection"; "Chronic Liver Allograft Rejection"; "Viral Hepatitis After Liver Transplantation"; Recurrence of the Original Disease After Liver Transplantation and Differential Diagnosis of Dysfunction in Long-Surviving Allografts"; Liver Pathology Course, Communidad de Madrid, Madrid, Spain, May 4-7, 1998.
  53. "Banff Classification of Liver Biopsy," The Transplantation Society XVII World Congress, Montreal, Canada, Jualy 12-17, 1998.
  54. "Chronic Rejection: A System Integration Problem," 24th Annual Meeting of the American Society for Histocompatibility and Immunogenetics, Vancouver, British Columbia, Canada, October 10-15, 1998.
  55. "Acute Liver Allograft Rejection," 49th Annual Meeting and Postgraduate Courses of the International Association for the Study of the Liver, Chicago, IL, November 6-10, 1998.
  56. "Interleukin-6/gp130 Signaling in the Ductular Reaction and In Development and Compensation of Biliary Cirrhosis," Hepatic Stem Cell Meeting, NIH, Bethesda, MD, December 10-11, 1998.
  57. "The Immune Network of the Liver: Disease as a Relationship Between Immune Function and Liver Structure," American Society for Investigative Pathology, Experimental Biology '99, Washington, DC, April 16-18, 1999.
  58. Chair. Updates: Rejection Classification and Chronic Allograft Dysfunction - Liver. Presentations: "Acute Liver Allograft Rejection: Assessment of the Banff Schema for Grading"; "Prospects of Developing a Grading/Staging System for Chronic Rejection:; "Viral Infection in the Liver Allograft: Implications for Late Function"; "Summary Report: Chronic Allograft Failure:; The Fifth Banff Conference on Allograft Pathology, Banff, Alberta, Canada, June 7-11, 1999.
  59. Co-Chair. Plenary Session IX: Future Trends. Presentations: "European Perspectives in Liver Transplantation: A Glimpse of the Past, Present and Future"; " Recurrent Disease/Viral Hepatitis"; Fifth Congress of the International Liver Transplantation Society (ILTS), Pittsburgh, PA, August 26-28, 1999.
  60. "The Role of Inflammatory Cytokines in the Control of Proliferation of the Biliary Tree," Falk Symposium No. 113, Regensburg, Germany, September 16-18, 1999.