I understand what you want.
The worldwide medical community (all doctors, hospitals, and all the drug companies) make their money by TREATING (not CURING) people that are sick. The worldwide medical community can only make money and continue to survive as long as people are either sick or believe that they are (fake diseases,..."DISORDERS", "syndromes" are used to make money).
So, you want a "documented case" of a CURE that the worldwide medical community PUBLISHES so that we don't need their services. Think about this for a second.
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You also "don't want an advice to boost her immunity", but you do want..."and then naturally boosting the immunity" so that she will get the
"nutrients that she needs".
Slow down and think about all of this because cures can only come from healthy eating and nutrients that are "NATURAL" (not found in anything DOCUMENTED by pharm/med) and will boost her immunity. Other posters might have more specific information on what is healthiest for her condition, but you are going to have to realize that there is no such thing as a "documented case" of a cure that will put the worldwide medical community out of business (that would amount to pharmaceutical and medical (pharm/med) industry suicide.
Right now, the immunosuppressant is being used to keep the body's defense system from rejecting the kidney. BOOSTING the immune system right now would be counterproductive and possibly DEADLY, so for now, it's probably best to wait a while before doing anything extraordinary about health.