1. Graduate Medical Education College of Medicine, University of Illinois Chicago Chicago Illinois USA
2. Department of Ophthalmology and Visual Sciences College of Medicine, University of Illinois Chicago Chicago Illinois USA
3. Department of Medicine, Division of Pulmonary, Critical Care, Sleep and Allergy College of Medicine, University of Illinois Chicago Chicago Illinois USA
4. Department of Otolaryngology – Head and Neck Surgery College of Medicine, University of Illinois Chicago Chicago Illinois USA