[1] Comprehens Canc Ctr Stedendriehoek Twente, Dept Res & Registrat, NL-7514 BP Enschede, Netherlands
[2] Comprehens Canc Ctr E, Nijmegen, Netherlands
[3] Univ Nijmegen, Dept Epidemiol, Nijmegen, Netherlands
[4] Comprehens Canc Ctr Amsterdam, Amsterdam, Netherlands
[5] Comprehens Canc Ctr S, Eindhoven, Netherlands
[6] Erasmus MC, Dept Publ Hlth, Rotterdam, Netherlands