1 Division of Internal Medicine, Department of Medicine, George Washington University School of Medicine and Health Sciences, Washington, DC.
2 Division of Otolaryngology, Department of Surgery, George Washington University School of Medicine and Health Sciences, Washington, DC.
3 Division of Allergy and Immunology, Department of Medicine, George Washington University School of Medicine and Health Sciences, Washington, DC. Electronic address: akeswani@mfa.gwu.edu.