Ilias C Papanikolaou1, Om P Sharma2. 1. Division of Pulmonary and Critical Care, Keck School of Medicine, University of Southern California, Los Angeles, CA; Third Pulmonary Department, Sismanoglio General Hospital, Athens, Greece. Electronic address: hliaspapa@hotmail.com. 2. Division of Pulmonary and Critical Care, Keck School of Medicine, University of Southern California, Los Angeles, CA.