1. Reticulum cell sarcoma after renal transplantation and azathioprine and prednisone therapy;Doak;BMJ,1968
2. Malignant lymphomas in transplantation patients;Penn;Transplant Proc,1969
3. Development of cancer as a complication of clinical transplantation;Penn;Transplant Proc,1977
4. Risk of cancer in renal transplant recipients;Hoover;Lancet,1973
5. Skin cancer and immunosuppression;Walder;Lancet,1971