JC virus DNA in cerebrospinal fluid samples from brazilian AIDS patients with focal brain lesions without mass effect - Fink, Maria Cristina Domingues da Silva; Oliveira, A. C. Penalva de; Milagres, F. A. P.; Vidal, J. E.; Pouza, A. F. Picerno; Duarte Neto, A.; Pannuti, Cláudio Sérgio (Journal of Infectional, 2006)