Increase in the frequency of mutation at codon 215 associated with zidovudine resistance in HIV-1-infected antiviral-naive patients from 1989 to 1996 [2]

1. Rubio, A.
2. Leal, M.
3. Pineda, J.A.
4. Caruz, A.
5. Luque, F.
6. Rey, C.
7. Sanchez-Quijano, A.
8. Lissen, E.