So, I think it's quite possible that GILD's NS5A GS-5885 can produce similar results. Two weeks ago GILD added Arm-17, and Arm-18 to this ongoing study. So testing of Sofosbuvir/GS-5885 and Sofosbuvir/5885/riba in GT2/GT3 has begun. http://clinicaltrials.gov/ct2/show/NCT01260350?term=gs-5885&rank=10