SELLAS Reports Promising Updated Clinical Data and Initial Immune Response Profiles from Ongoing Phase 1/2 Study of Galinpepimut-S (GPS) Combined with Keytruda for Treating WT1+ Advanced Ovarian Cancer forextv.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from forextv.com Daily Mail and Mail on Sunday newspapers.