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Italian Dermatological Society.
Danish Dermatological Society.
La Société Française de Dermatologie et de Syphiligraphie.
Section on Dermatology, Royal Society of Medicine.
British Association of Dermatology and Syphilis.
Berlin Dermatological Society.
Cologne Dermatological Society.
German Dermatological Society in Czechoslovakia Republic.
Vienna Dermatological Society.
Munich Dermatological Society.
Deutsche Dermatologische Gesellschaft.