Petersen, Rick: - Dr. Richard Petersen, a Doctor of Chiropractic, is co-founder of the world-renowned Root Cause Medical Clinics in Sunnyvale, California and Clearwater, Florida. Dr. Petersen holds a Bachelor of Sciences degree from Iowa State University, and a Doctor of Chiropractic from Northwestern College of Chiropractic. After many years of private practice in Minnesota, Dr. Petersen moved to California, and in 1992 established Root Cause Medical Clinic with his wife, Dr. Vikki Petersen. Dr. Petersen is the co-author of the bestselling book, The Gluten Effect, widely hailed as a breakthrough in the understanding of non-celiac gluten sensitivity. A speaker for the Doctors' Speakers Network, Dr. Petersen has presented health lectures for a number of Fortune Five Hundred companies, including: Apple, HP, and Cisco Systems. Dr. Petersen regularly appears on radio and TV, educating the public on the hidden dangers of gluten. Recently featured in an exclusive interview on CNN Headline News, Dr Petersen is also endorsed by the National Foundation for Celiac Awareness & The Gluten Intolerance Group of North America.