Association study of CCR5 delta 32 polymorphism among the HLA-DRB1 caucasian population in northern Paraná, Brazil - Muxel, Sandra Marcia; Borelli, Sueli Donizete; Amarante, Marla Karine; Voltarelli, Júlio César; Aoki, Mateus Nobrega; Oliveira, Carlos Eduardo Coral de; Watanabe, Maria Angélica Ehara (Journal of Clinical Laboratory Analysis, 2008)