Nelson Hendler is a 1966 cum laude graduate of Princeton University, where he also played varsity lacrosse. He received an MD in 1972, and a MS in neurophysiology in 1974, from University of Maryland, and did his residency training in psychiatry at Johns Hopkins Hospital from 1972 to 1975. Dr. Hendler was Assistant Professor of Psychiatry and Neurosurgery at Johns Hopkins University School of Medicine for 31 years, and Associate Professor of Physiology at University of Maryland School of Dental Surgery. He was clinical director of Mensana Clinic from 1978 to 2006, which was listed in Business Week as one of the 8 best pain clinics in the United States, along with Mayo Clinic, Johns Hopkins Hospital and Cleveland Clinic. He has published four books, 34 textbook chapters, and 71 articles. He was past president of the Reflex Sympathetic Dystrophy Association of America, and of the American Academy of Pain Management. He has testified before the US Senate three times on medical issues for Senator Edward Kennedy, Senator Barbara Mikulski, and Senator Howard Metzenbaum. He serves as the assistant editor of four medical journals, and has lectured in 12 countries and over 60 medical schools and hospitals, including Mayo Clinic, Cornell, Johns Hopkins Hospital, Uni. of Chicago, and Harvard Cybermedicine. He was the first honorary member of the Israeli Pain Society, he keynote speaker at the 9th Argentinean Congress on Pain and is a Fellow of the American Psychiatric Association, and the Academy of Psychosomatic Medicine. Recently, Dr. Hendler developed “Expert Systems,” for use over the Internet, based on research showing that 40%-80% of chronic pain patients are misdiagnosed. The Pain Validity Test predicts with 95% accuracy which patient will have abnormal medical tests. The Pain Diagnostic Paradigm and Treatment Algorithm gives diagnoses with a 96% correlation with diagnoses of Johns Hopkins Hospital doctors, and recommends the proper diagnostic tests to use. The Headache Diagnostic Test has a 94 % correlation with diagnoses of Johns Hopkins Hospital doctors. The company website is www.PainValidityTest.com.