1. Infectious Diseases Division, Warren Alpert Medical School of Brown University, Rhode Island Hospital, Providence, RI, United States
2. School of Medicine, European University Cyprus, Nicosia, Cyprus
3. Hellenic Centre for Disease Control and Prevention, Athens, Greece
4. Department of Hygiene, Epidemiology and Medical Statistics, Medical School, National and Kapodistrian University of Athens, Athens, Greece
5. Dean's Professor of Medical Science (Medicine of Molecular Microbiology and Immunology), Chief, Infectious Diseases Division, Warren Alpert Medical School of Brown University, Rhode Island Hospital, 593 Eddy Street, POB, 3rd Floor, Suite 328/330, Providence, RI 02903, United States