Gilead/Galapagos gets a setback for filgotinib, its JAK1 inhib, that was poised to be the next approved RA drug by FDA. Instead the FDA issued a complete response letter; citing concerns over sperm studies (MANTA, MANTA-RAy) & 200 mg dose. Delay till 2021? https://t.co/H0rLjOMXq8 https://t.co/Rk8PXblfPO