1. Rush Medical College of Rush University Medical Center, Chicago, IL, USA
2. University of South Florida, Tampa, FL, USA
3. Retina Vitreous Associates of Florida, Clearwater, FL, USA
4. National Prion Disease Pathology Surveillance Center, Case Western Reserve University, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
5. Oncology & Hematology of White Plains, White Plains, NY, USA