Would you drastically change your diet and sleep cycle if you had a serious disorder like ulcerative colitis or lupus to see if you could heal your illness naturally? It is a trade-off of extreme diets for extreme diseases versus extreme treatments.   This week, Dr. Kahn features two examples of extreme but successful diet programs, one for autoimmune diseases like SLE (lupus) and one specifically for Crohn's and Colitis.   The authors of the two books featured do offer consultation on achieving success against these extreme therapies. The power of the human body to heal itself is the theme of the week.