1 Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee.
2 Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee.
3 Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee. Electronic address: basil.kahwash@vumc.org.