1. Department of Otorhinolaryngology–Head and Neck Surgery, Rush University Medical Center, Chicago, Illinois, USA
2. Division of Nursing, Rush University Medical Center, Chicago, Illinois, USA
3. Department of Otolaryngology–Head and Neck Surgery, Loma Linda Medical Center, Loma Linda, California, USA
4. Department of Medicine, Division of Pulmonary Medicine, Rush University Medical Center, Chicago, Illinois, USA