I have 43 years of experience, and specialize in the field of neurosurgery with specific knowledge in the areas of spine surgery, radio surgery and microsurgery. I have published on such topics as lumbar and cervical spine surgery, gamma knife radio surgery and diagnostic criteria for spine surgery. I have testified on wrong level spine surgery, post-operative epidural hematoma and post-operative epidural abscess. In the 43 years of lumbar and cervical disc surgery. I have never had a patient die or be paralyzed.