1. Department of Internal Medicine; Division of General Internal Medicine and Infectious Diseases; University of Groningen; University Medical Center Groningen; Groningen The Netherlands
2. Department of Internal Medicine; Infectious Diseases Service; Rijnstate Hospital; Arnhem The Netherlands
3. Department of Biostatistics; Erasmus Medical Center; Rotterdam The Netherlands
4. Department of Internal Medicine; Medical Spectrum Twente; Enschede The Netherlands
5. Department of Internal Medicine; Medical Center Haaglanden; The Hague The Netherlands
6. Department of Internal Medicine & Infectious Diseases; University Medical Center Utrecht; Utrecht The Netherlands
7. Charleroi University Hospital; AIDS Reference Center; Charleroi Belgium
8. Department of General Internal Medicine and Infectious Diseases; Radboud University Medical Center; Nijmegen The Netherlands
9. Department of Internal Medicine; Catharina Hospital; Eindhoven The Netherlands
10. Department of Internal Medicine; Kennemer Gasthuis; Haarlem The Netherlands
11. Department of Internal Medicine; Isala Clinics; Zwolle The Netherlands
12. Department of Pulmonary Disease and Tuberculosis; University of Groningen; University Medical Center Groningen; Groningen The Netherlands