Khalil Diab1,2, Karen Rieger3, Aliya Noor2. 1. LAU Gilbert and Rose-Marie Chagoury School of Medicine, Division of Pulmonary & Critical Care Medicine, Blat, Lebanon. 2. Division of Pulmonary, Critical Care, Sleep & Occupational Medicine. 3. Department of Cardiothoracic Surgery, Indiana University School of Medicine, Indianapolis, IN.