Subjects will be given up to 2 treatments of NASHA/Dx or sham and followed for 6 months from last treatment (ie, one retreatment is permitted at 1 month after the first injection) in the blinded phase of the study. At Month 6, the open phase of the study will begin and subjects on sham will be offered open-label treatment with NASHA/Dx.
Subjects who receive NASHA/Dx at the start of the blinded phase will be followed for up to 36 months from last treatment in the blinded phase. Subjects who receive sham at the start of the blinded phase and then receive open-label NASHA/Dx at Month 6 (start of the open phase) will be followed for another 24 months (equivalent to approximately 30 months from randomization) from last treatment in the open phase of the study.
