Affiliation: | 1. Departments of Pathology, University of Oulu and Oulu University Central Hospital, SF-90220, Oulu 22, Finland 2. Department of Dermatology, University of Turku, SF-20520, Turku 52, Finland 3. Department of Pathology, Tampere University Central Hospital, SF-33520, Tampere 52, Finland 4. Department of Medicine, University of Southern California, 90033, Los Angeles, California, USA 5. Department of Pathology, University of Southern California, 90033, Los Angeles, California, USA
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