1. Department of Internal Medicine I; Bonn University Hospital; Bonn Germany
2. UCL; London UK
3. Hospital Carlos III; Madrid Spain
4. Department of Infectious Diseases and Rheumatology; CHIP; Rigshospitalet; Copenhagen Denmark
5. Istituto Di Clinica Malattie Infettive e Tropicale; Milan Italy
6. Gomel State Medical University; Gomel Belarus
7. Kiev Centre for AIDS; Kiev Ukraine
8. Klinicki Centar Univerziteta Sarajevo; Sarajevo Bosnia-Herzegovina