Hi Mike, ... ... This is not a direct response to your question, but as ”grist for your mill” you...
This is not a direct response to your question, but as "grist for your mill" you might like to consider the following:
Are you aware of the almost miraculous results many tens (hundreds?) of THOUSANDS of people have experienced, dealing with most of the health issues known to humankind, from ingesting ascorbic acid?
If you are still interested in finding a solution to your wife's cancer problem, and her gaining greater health in ALL areas of her body, I STRONGLY encourage you/her to read this article written by Dr. Robert Cathcart, M.D. http://vitamincfoundation.org/www.orthomed.com/titrate.htm
Perhaps it may solve some or all of her cancer problem. She has only better health and well-being to gain by applying its recommendation. What have you/she got to lose?
These two quotes are instructive:
"There are more than ten thousand scientific papers that make it quite clear that there is not one body process (such as what goes on inside cells or tissues) and not one disease or syndrome (from the common cold to leprosy) that is not influenced - directly or indirectly - by vitamin C." -- Dr. Emanuel Cheraskin, M.D., Dr. Marshall Ringsdorf, D.M.D., and Dr. Emily Sisley, THE VITAMIN C CONNECTION.
“I have never seen a patient that Vitamin C would not benefit.” -- Dr. Frederick Klenner, M.D.
I wish you BEST success, Mike, in your search for a solution to your wife's cancer issue!