"They feel betrayed."

Don't we all! mad

I would recommend Chelation thrapy, Liver and Colon clease and preventives, such as the herbs (Essiac,Graviola, etc.) for prevention and healing. I would also add that it is prudent to watch his PH, while eating food that are more alkaline in nature. Cancer needs to have a very acidic environment in order to exist. Limiting consumption of foods that turn into sugars (acid) when digested, would be a good idea.

For the sweet tooth I would also recomend Mangosteen Juice or Fruit. The stuff is really good for many ailments including degenerative diseases such as arthritis. It helps many to ease the problems associated with Arthritis or joint diseases. Without it, my flexibility for Yoga asanas or poses, would be more resticted. BTW, yoga is also benficial in maintaining one's health, when afflicted with mobility problems no matter the age or one's mobility. In yoga, what ever you can do, is theraputic.
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Whoever undertakes to set himself up as a judge of
Truth and Knowledge is shipwrecked by the laughter
of the gods.

-- Albert Einstein