1. Professor, Department of Public Health, University of Tampere, POB 607 FIN-33101 Tampere FI.
2. Senior Researcher; and Professor, Head of Laboratory, respectively, HIV Laboratory, National Public Health Institute, Helsinki, FI.
3. Department of Clinical Pathology and Forensic Medicine, University of Kuopio, FI.
4. Senior Lecturer, Department of Forensic Medicine, University of Helsinki, Helsinki, FI.
5. Head of the Laboratory, Department of Pathology, Aurora Hospital, Helsinki, FI.