1. Department of MedicineThomas Jefferson University HospitalPhiladelphiaPennsylvania
2. Department of MedicineRush University Medical CenterChicagoIllinois
3. Department of MedicineNorthwestern University Feinberg School of MedicineChicagoIllinois
4. Department of Infectious DiseaseRush University Medical CenterChicagoIllinois
5. Department of PathologyRush University Medical CenterChicagoIllinois
6. Department of MedicineJohn H Stroger, Jr Hospital of Cook CountyChicagoIllinois