Apparently they wanted to take the boy for treatment in Czechoslovakia for "Proton beam"? treatment. They don't do it in this country.
The parents were trying to do the best for their child.
I Have a bit of an opinion on this, a few years ago, a treatment CCSVI, was suggested for MS. It wasn't widely available in this country, I went to Poland to have the procedure. All the medics in this country were totally against it, however it seemed to help me. My Neurologist wouldn't speak me afterwards, now I see the nurse specialist.
I have a lot of sympathy with the boys parents, it seems wrong to keep them from their child.
Perhaps the eldest boy ( don't know how old he is) could take his brother for treatment.