Protocol: Filgotinib in addition to methotrexate versus filgotinib monotherapy in patients with rheumatoid arthritis with an inadequate response to methotrexate: A multicenter, prospective, open-label, randomized controlled trial (FAITHFUL Study) - Mitsuhiro Akiyama; Toshihiko Hidaka; Motohide Kaneko; Satoshi Ito; Hiroaki Taguchi; Tomonori Ishii; Shuji Asai; Shintaro Hirata; Kei Ikeda; Katsuya Suzuki; Naoki Kato; Yuko Kaneko (PLoS ONE, 2025)