dministration of the enfuvirtide-regimen (B-1 between 500 and4000RNAcopies/ml,U-1between50and1000copies/ml),whereasthe sampling for the third patient (B-5) occurred 12 weeks afternadir viral load and reversion to wild-type might have occurreddue to adherence issues.Attherapyfailure,themostcommonlymutatedAAwasV38thatwas altered in 9 patients, i.e. A in 6, E in 1 and M in 3.