Basic immunology functions and disorders of the immune system / Abul K. Abbas, MBBS, Emeritus Professor, Department of Pathology, University of California San Francisco, San Francisco, California, Andrew H. Lichtman, MD, PhD, Professor of Pathology, Harvard Medical School, Brigham and Women's Hospital, Boston, Massachusetts, Shiv Pillai, MBBS, PhD, Professor of Medicine and Health Sciences and Technology, Harvard Medical School, Massachusetts General Hospital, Boston, Massachusetts ; illustrations by David L. Baker, MA.