1Virology and Pathology Laboratories, School of Medicine, "Gr. T. Popa" University of Iasi, Romania and Laboratoire de Retrovirologie, Centre International de Recherches Médicales, Franceville, Gabon
2Laboratoire de Virologie, Hôpital Bichat-Claude Bernard, Paris, France
3Department of Zoology, University of Oxford, Oxford, UK
4National AIDS Reference Center, Chisinau, Republic of Moldova
5National Reference Laboratory for Blood Transmitted Viruses, National Institute for Transfusional Haemarology, Bucharest, Romania