I have 30 years of experience, and specialize in the field of gastroenterology and hepatology with specific knowledge in the areas of intestinal diseases, chronic hepatitis and prevention of disease with endogenous antioxidants. I have published on such topics as gastroenterology and hepatology, antioxidants in ameliorating damage from tobacco smoke and antioxidants in clinical practice with emphasis on glutathione and selenium. I was selected by my peers in gastroenterology as a Master of the American College of Gastroenterology. I received the Premier Physician award from the Crohns and Colitis Foundation of America.