1. Jesper L. Boldsen, Institute of Community Health, University of Ode use, J. B. Winsløws Vej 17, DK-5000 Odense C, Denmark, Address for offprints: Jesper L. Boldsen Inst of Community Health University of Odense J. D. Winslowsvej 17 Dk-5000 Odense C Denmark
2. Bernard Jeune, Institute of Community Health, University of Ode use, J. B. Winsløws Vej 17, DK-5000 Odense C, Denmark
3. Paul C. Madsen, AIDS-INFO/Fyn, Klaregade 35, DK-5000 Odense C, Denmark