1. Royal Free Centre for HIV Medicine and Department of Primary Care and Population Sciences, Royal Free and University College Medical School, London, NW3 2PF UK.
2. Hospital Carlos III, Madrid, Spain.
3. Universitäts Klinik, Bonn, Germany.
4. Karolinska Hospital, Stockholm, Sweden.
5. Hôpital de la Pitié-Salpétière, Paris, France.
6. Medical University, Szczecin, Poland.
7. Infectology Centre of Latvia, Riga, Latvia.
8. Copenhagen HIV Program, Hvidovre Hospital, Copenhagen, Denmark.