Front Cover; Advances in Cancer Research, Volume 40; Copyright Page; Contents; Contributors to volume 40; Chapter 1. 5-Methylcytosine, Gene Regulation, and Cancer; Chapter 2. lmmunobiology of Infection with Human Cytomegalovirus; Chapter 3. Genetics of Resistance to Virus-Induced Leukemias; Chapter 4. Breast Carcinoma Etiological Factors; Chapter 5. Treatment of Acute Leukemia--Advances in Chemotherapy, Immunotherapy, and Bone Marrow Transplantation; Chapter 6. The Forty-Year-Old Mutation Theory of Luria and Delbrück and Its Pertinence to Cancer Chemotherapy.