University of Bonn (1947 -1951)
University of Freiburg i. Brsg. (1951)
Heinrich-Heine-University (HHU), D
Pathological Institute HHU (Residency)(1953-54)
Martinus-Hospital, D
HHU General Surgery Residency (Prof. Derra) (1958-59)
HHU Cardiothoracic Residency (Prof. Derra) 1959-64
HHU Subdepartment Cardiothoracic Surg.(Chief) 1964-70
HHU Department Cardiothoracic Surg. (Chief) 1970-92
HHU Professor emeritus Dr.med. Dr.med. h.c. 1992
History of Cardiac Surgery
Longterm-results after cardiac surgery