1. International Antiviral Therapy Evaluation Center, Department of Internal Medicine, Academic Medical Center, University of Amsterdam, 1005 Amsterdam, The Netherlands.
2. Department of Pharmacy and Pharmacology, Slotervaart Hospital, Amsterdam, The Netherlands.
3. Marcia Street Practice, Johannesburg, South Africa.
4. Servicio de Immunocomprometidos, J.M. Ramos Mejia Hospital, Buenos Aires, Argentina.
5. Department of Infectious Diseases, Pomeranian Medical Academy, Szczecin, Poland.
6. AIDS Outpatient Clinic, University of Alabam at Birmingham, Birmingham, Alabama.
7. Edouard Herriot Hospital, Lyon, France.
8. Boehringer Ingelheim, Ridgefield, Connecticut.
9. Boehringer Ingelheim, GmbH, Ingelheim, Germany.