David D. Clarke, MD is President of the Psychophysiologic Disorders Association. He is Clinical Assistant Professor of Gastroenterology Emeritus at Oregon Health & Science University in Portland, Oregon, USA. He is board-certified in Gastroenterology and Internal Medicine and has conducted detailed interviews with over 7000 patients whose pain or other symptoms were not explained by diagnostic tests. Findings from these are summarized in his book They Can’t Find Anything Wrong! He lectures internationally about Psychophysiologic Disorders to health care professionals and the public and has done over 300 interviews for television, radio and podcasts. Website is EndChronicPain.org.