CTLA-4 Gene Polymorphisms (-318C/T, +49A/G, +6230A/G) in Iranian Patients with Multiple Sclerosis - Heidari, Abolfazl; Keramatipour, Mohammad; Amirzargar, Ali Akbar; Rashidinezhad, Ali; Sahmani, Ahmad Ali; Mozhdehipanah, Hossein; Noori Daloii, Mohammad Reza (Iranian Journal of Allergy, Asthma and Immunology)