Afshin Sam1, Monica Kraft2. 1. Division of Pulmonary and Critical Care Medicine, Department of Medicine, Colege of Medicine, Tucson, University of Arizona Health Sciences, Tucson, AZ. 2. Division of Pulmonary and Critical Care Medicine, Department of Medicine, Colege of Medicine, Tucson, University of Arizona Health Sciences, Tucson, AZ. Electronic address: kraftm@email.arizona.edu.