TY  - JOUR
A1  - Downs, A.
A1  - De Vincenzi, I.
T1  - Probability of heterosexual transmission of HIV: relationship to the number of unprotected sexual contacts
Y1  - 1996
JF  - Journal of Acquired Immune Deficiency Syndromes
VL  - 11
SP  - 388
EP  - -395

ER  -