JC virus detection by PCR in the CSF samples of aids patients with focal brain lesions without mass effect - Fink, M. C. D. A.; Oliveira, A. C. Penalva de; Vidal, J. E.; Pouza, A. F. Pincerno; Milagress, F. A.; Amaro, N. D. N.; Pannuti, C. S. (International Symposium on Infections in the Immunocompromised Host, 2004)