He was President of the European Teratology Society (1980–1982); and a co-founder and Chairman (1979–1981) of the International Clearinghouse for Birth Defects Monitoring Systems (ICBDMS).
Er war Präsident der European Teratology Society (1980–1982) sowie Mitbegründer und Vorsitzender (1979–1981) der International Clearinghouse for Birth Defects Monitoring Systems (ICBDMS).