1. J.W. Goethe University Hospital, Institute for Medical Virology, 60596 Frankfurt, Germany.
2. J.W. Goethe University Hospital, Medical HIV Treatment and Research Unit, Department of Internal Medicine II, 60590 Frankfurt, Germany.
3. HIV Speciality Practice, 60311 Frankfurt, Germany.
4. J.W. Goethe University Hospital, Immunodeficiency Unit, Department of Pediatrics III, 60590 Frankfurt, Germany.
5. Institute for Immunology and Genetic, Medical Laboratory Dr. med. B. Thiele, 67653 Kaiserslautern, Germany.