1. Virology Department, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania.
2. Viral Emerging Diseases Department, Ştefan S. Nicolau Institute of Virology, Bucharest, Romania.
3. HIV/AIDS Department, Dr Victor Babes Hospital for Infectious and Tropical Diseases, Bucharest, Romania.
4. Pathology Department, University of California at San Diego, Gilman, La Jolla, California, USA.