Doctor of Medicine, Leiden University, 1987. Doctor of Philosophy, Erasmus University, Rotterdam, The Netherlands, 1998.
Senior house officer surgery Bergweg Hospital, Rotterdam, 1987-1988. Senior registrar radiation oncology University Hospital Rotterdam-Daniel den Hoed Cancer Center, 1989—1993, radiation oncologist, 1993-2000, Leiden (The Netherlands) University Medical Center, since 2000.
Member Dutch Cancer Society (member committee clinical comparative research 1998, grantee 1990).
Married Rutger J.W. Klei, October 10, 1987. Children: Dorine, Paul.