1 MD, Professor of Medicine and Head of the HIV Outpatient Clinic, University of Bonn, Sigmund-Freud-Str. 25, 53105 Bonn, Germany.
2 MD, Institute of Public Health, University of Porto, Rua das Taipas n°135, 4050-600 Porto, Portugal.
3 MD, PhD, Professor, Department of Infectious Diseases I, Carol Davila University of Medicine and Pharmacy, National Institute for Infectious Diseases "Prof. Dr. Matei Balș", No. 1 Dr. Calistrat Grozovici street, 021105 Bucharest, Romania.