Effectiveness of a bundled intervention including adjunctive corticosteroids on outcomes of hospitalized patients with community-acquired pneumonia: a stepped-wedge randomized clinical trial - Lloyd, M; Karahalios, A; Janus, E; Improving Evidence-Based Treatment Gaps and Outcomes in Community-Acquired Pneumonia (IMPROVE-GAP) Implementation Team at Western Health (JAMA Intern Med, 2019)