A Study Comparing the Efficacy and Safety of Etrolizumab With Adalimumab and Placebo in Participants With Moderate to Severe Ulcerative Colitis (UC) in Participants Naive to Tumor Necrosis Factor (TNF) Inhibitors (Study #2)

Study for Participants With Ulcerative Colitis Previously Enrolled in Etrolizumab Phase II/III Studies