Can someone help me clarify something regarding exon skipping?   On AVI BioPharma's website, it states that my son's specific deletion (46-52) would be helped by skipping exon 53. (http://www.avibio.com/our-programs/rare-diseases/duchenne-muscular-dystrophy/).   However, when I exchanged an email with Prosensa, they stated that he would need two skips, exons 45 and 53 or exons 53 and 54.   Can an…