1. Department of Otolaryngology-Head and Neck Surgery, University of California, San Diego, San Diego, CA, USA
2. Division of Pulmonology, Critical Care, Sleep Medicine and Physiology, University of California, San Diego, San Diego, CA, USA
3. Department of Pulmonology and Critical Care Medicine, Scripps Hospital Encinitas, Encinitas, CA, USA
4. Division of Cardiothoracic Surgery, Department of Surgery, University of California, San Diego, San Diego, CA, USA