- K65R with and without S68: a new resistance profile in vivo detected in most patients failing abacavir, didanosine and stavudine. Røge, B.T., Katzenstein, T.L., Obel, N., Nielsen, H., Kirk, O., Pedersen, C., Mathiesen, L., Lundgren, J., Gerstoft, J. Antivir. Ther. (Lond.) (2003)