David Hartman, Ph.D., until recently affiliated with Rush Presbyterian St. Lukea (TM)s Hospital and Chicago Medical School, is now in private practice of clinical, forensic, and medical neuropsychology and clinical psychology (adult and child). He is a Diplomate of the American Board of Professional Neuropsychology and a Fellow of the American college of Professional Neuropsychology. Dr. Hartman is a "nationally known clinical expert on human toxic exposure effects."