Gilead and Galapagos Announce TORTUGA Phase 2 Study of Filgotinib in Ankylosing Spondylitis Achieves Primary Endpoint 09/06/2018 Medications, FOSTER CITY, Calif. & MECHELEN, Belgium--(BUSINESS WIRE)--Sep. 6, 2018-- Gilead Sciences, Inc. (NASDAQ:GILD) and Galapagos...