1 KU Leuven - University of Leuven, Department Microbiology and Immunology, Rega Institute for Medical Research, Leuven, Belgium.
2 Department of Clinical Sciences, Aids Reference laboratory, Institute of Tropical Medicine, Antwerp, Belgium.
3 Global Health and Tropical Medicine-GHTM, Institute for Hygiene and Tropical Medicine, Universidade NOVA de Lisboa, Lisbon, Portugal.
4 National Reference Laboratory of HIV, National Center of Infectious and Parasitic Diseases, Sofia, Bulgaria.
5 'L. Sacco' Hospital, Infectious Diseases and Immunopathology Section, Department of Biomedical and Clinical Sciences 'L. Sacco', University of Milan, Milan, Italy.
6 AIDS Reference Laboratory, Université Libre de Bruxelles, Hopital Erasme, Brussels, Belgium.
7 Department of Infection and Immunity, Laboratory of Retrovirology, Luxembourg Institute of Health, Luxembourg, Luxembourg.
8 HEM - Centro Hospitalar de Lisboa Ocidental, SPC, LMCBM, Lisbon, Portugal.
9 EuResist Network GEIE, Rome, Italy.
10 University of Cologne, Institute of Virology, Cologne, Germany.
11 Unit of Medical Microbiology (MBLG), Université Catholique de Louvain, Institute of Experimental and Clinical Research (IREC), Brussels, Belgium.
12 Clinical Laboratory, Kocaeli University, Izmit, Kocaeli, Turkey.
13 Molecular Diagnostics Laboratory, National Institute for Infectious Diseases 'Matei Bals', Bucharest, Romania.
14 Universitat Autònoma de Barcelona, IrsiCaixa AIDS Research Institute, Badalona, Catalonia, Spain.
15 Institut de Recherche pour le Développement, INSERM U1175, and University of Montpellier, Unité Mixte Internationale 233, Montpellier, France.
16 Department of Laboratory Medicine, Division of Clinical Microbiology, Karolinska Institutet, Stockholm, Sweden.
17 Department of Microbiology and Infection Control, Universitair Ziekenhuis Brussel, Brussels, Belgium.
18 Department of Microbiology, Saint-Pierre University Hospital, Brussels, Belgium.
19 Department of Clinical Chemistry, Microbiology and Immunology, AIDS Reference Laboratory, Ghent University, Ghent, Belgium.