M.H.
Hi C.,
I'm sorry I don't have first hand knowledge of this issue but I was wondering if you or your daughter have thought of seeking out an Naturopath (ND) to see if there is any alternative treatment. I know this is genetic because it involves a mutation of a gene but sometimes it's possible to "mutate" something in another direction to get an improved condition. There are many alternative clinics in the US that could probably give you some info on who you should talk to. Just a thought....
God bless,
M.