TY  - JOUR 
T1  - Two variants of HIV-1 B serotype are transmitted heterosexually in São Paulo, Brazil
JO  - Brazilian Journal of Medical and Biological Research
A1  - Casseb, J.
A1  - Hong, M.A.
A1  - Gonsalez, C.
A1  - Brígido, L.F.
A1  - Duarte, A.J.S.
A1  - Michael-Hendry, R.
SN  - 0100-879X
UL  - 10.1590/S0100-879X1998001000002
VL  - 31 
Y1  - 1998
PB  - Brazil 
ER  -