1. From the Clinical Research, Investigation, and Systems Modeling of Acute Illness Center, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh (T.D.G.); the Pulmonary, Critical Care, and Sleep Medicine Division, Department of Medicine, Ohio State University Wexner Medical Center, Columbus (M.C.E.), and the Department of Critical Care Medicine, Respiratory Institute, Cleveland Clinic Foundation, Cleveland (R.D.H.) — both in Ohio; the Division of Pulmonary and...