Hiv-1 associated myelopathy (ham / tsp) in ribeirao preto-sp, brasil diagnosis confirmed by pcr - Takayanagui, O M; Biscaro, T A; Covas, D T; Machado, A. A.; Sato, Takassu; Odashima, N; Rios, S P; Moura, L S; Jardim, E (Colloque International de Dakar sur L'etiologie et Pathologie des Maladies Infectienses, 1995)