Placebo to match Tofacitinib

Janus Kinase Inhibition to Prevent Ventilator-induced Diaphragm Dysfunction

Study to Evaluate Safety, Tolerability, and Efficacy of GS-5718 in Participants With Active Rheumatoid Arthritis Who Have an Inadequate Response to Disease-modifying Antirheumatic Drug(s) (bDMARDs) Treatment