Dr Neil Nathan, MD, has been working with CFS/ME for 25 years (practicing for 47 years) and has published several books and research papers in this field. His most recent book, Toxic: Heal Your Body from Mold Toxicity, Lyme Disease, Multiple Chemical Sensitivities, and Chronic Environmental Illness, has helped physicians and consumers to understand how mold toxicity and Lyme disease are major unrecognized causes of CFS/ME.