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Dutch Society of Nephrology, Amsterdam, The Netherlands May 20, 1978
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Dutch Society of Nephrology
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Dutch Society of Nephrology Gent, Belgium, November 17, 1979
Dutch Society of Nephrology, Amsterdam, The Netherlands, November 15, 1980
Dutch Societies of Nephrology and Urology
Dutch Society of Nephrology Dutch Society of Nephrology Groningen, The Netherlands November 29, 1975
The Dutch Society of Nephrology
Dutch Society of Nephrology, Nÿmegen, Holland, June 18, 1977
Dutch Society of Nephrology, Utrecht, The Netherlands, May 29, 1976
Dutch Society of Nephrology, Leiden, The Netherlands, November 26, 1977