They DO NOT Need to do a biopsy. My son has a poiont mutaiton - also known as a stop codon. PLEASE contact University of Utah and ask for Kevin Flannigan. He will find the point mutaiton from a blood test for FREE. You will join his study and he will send you a blood kit.
if it is a point mutation- that is the drug PTC124 is working on.
If you need information- email me and i will gladley put you in touch with these people.
I can also find info as to who is doing the same sequencing over there.
Let me know if you would like some help.