[Congratulations to Prof. C. Schirren on the occasion of his 90th birthday].
Universitäts-Haut- und Poliklinik, Rheinischen Friedrich-Wilhelms-Universität Bonn, Sigmund-Freud-Str. 25, 53127, Bonn, Deutschland.
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D033441:Andrology / Q000266:history*; D003880:Dermatology / Q000266:history*; D005858:Germany; D049673:History, 20th Century; D049674:History, 21st Century