1. Department of Pathology; Johns Hopkins Medical Institutions; Baltimore MD USA
2. Office of Scientific Research; Norte University; Asunción Paraguay
3. Department of Otolaringology and Head & Neck Surgery; Johns Hopkins Medical Institutions; Baltimore MD USA
4. Department of Pathology; Hôpital Pitié-Salpêtrière; Paris France
5. Department of Urology; Johns Hopkins Medical Institutions; Baltimore MD USA
6. Department of Oncology; Johns Hopkins Medical Institutions; Baltimore MD USA