Farber, founder of Children's Hospital Cancer Research Foundation, with a young patient. No photographer credited, dated 1960. Sidney Farber (September 30, 1903 - March 30, 1973) was an American pediatric pathologist, regarded as the father of modern chemotherapy. In the mid-1920s, Jewish students were often refused admission to US medical schools. Fluent in German, he undertook his first year of medical school at the Universities of Heidelberg and Freiburg. He entered Harvard Medical School as a second year student and graduated in 1927. While working at Harvard Medical School he carried out the preclinical and clinical evaluation of aminopterin, a folate antagonist in childhood acute lymphoblastic leukemia. He showed for the first time that induction of clinical and hematological remission in this disease was achievable. In1955 he discovered that the antibiotic actinomycin D and radiation therapy could produce remission in Wilms' tumor, a pediatric cancer of the kidneys. In the early 1950s he became a star presenter at Congressional hearings on appropriations for cancer research. A compelling speaker, he was very successful in his efforts. He died in 1973 at the age of 69. No photographer credited, dated 1960.