Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Recommended by a leading CFS MD (Cheney)

Based on a recommendation by Dr. Cheney, I read the book and found it a bit self-promotional but it contained clear scientific explanation for what was happening. It has significiantly improved my CFS and my husband's CFS. In fact, we both suffered "herx" (die-off) effects from doing it. It is NOT the easiest technique to learn, but it is effective and cleared up a persistant sinus infection that I have had for years, and corrected my husband's chronic snoring....You will not be "cured" in a 5 days, it is 5 days to learn the techniques that may eventually lead to a cure... PS>> The diet is VERY important...