1. Department of Otorhinolaryngology–Head and Neck SurgeryRush University Medical CenterChicagoIllinoisUSA
2. Loyola University of ChicagoStritch School of MedicineMaywoodIllinoisUSA
3. Creighton University School of MedicineOmahaNebraskaUSA
4. Rush University Medical Center LibraryChicagoIllinoisUSA