a single nucleotide polymorphism (snp) in cd24 has been associated with multiple sclerosis (ms) in a population based study. this snp results in the replacement of alanine (cd24a) by valine (cd24v) at amino acid 57 in the resulting polypeptide chain. in the current study, the genotyping of this snp and its contribution to ms in 217 patients and 200 healthy individuals of an iranian population w...