1. Department of Internal Medicine, John H. Stroger, Jr. Hospital of Cook County, Chicago, Illinois
2. College of Medicine, University of Benin, Benin, Edo, Nigeria
3. Division of Dermatology, John H. Stroger, Jr. Hospital of Cook County, Chicago, Illinois
4. Section of Dermatology, Department of Otorhinolaryngology–Head and Neck Surgery, Rush Medical College, Chicago, Illinois