GILD already tested regimens of sofosbuvir + ledipasvir + either ribavirin or GS-9669 taken for 12 weeks in GT1 treatment-experienced with advanced liver fibrosis or cirrhosis in the ELECTRON trial and got SVR12 of 100%:
So, I don't think GILD borrows a page from ABBV/ENTA rather they did try and still trying different combos to get rid of riba and shorten treatment duration.
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