* Includes patients who did not receive ENF and those who were previously treated with and continued ENF ** **Mutations in HIV protease at positions L10V, I13V, K20M/ R/ V, L33F, E35G, M36I, K43T, M46L, I47V, I54A/ M/ V, 58E, H69K, T74P, V82L/ T, N83D or I84V ENF Enfuvirtide; TPV/ r Tipranavir/ ritonavir