Institution: | 1. Rigshospitalet, Dept. of Communicable and Tropical Diseases, Copenhagen, Denmark;2. Statens Seruminstitut, Dept. of Clinical Microbiology, Rigshospitalet, Copenhagen, Denmark;3. Statens Seruminstitut, Dept. of Treponematoses, Copenhagen, Denmark;4. County Hospital, Depts of Medicine and Paediatrics, Kolding, Denmark |