1 Retired as Toxicologic Pathologist at TNO, Utrechtseweg 48, Zeist, Haagstraat 13, 3581SW, Utrecht, the Netherlands. Electronic address: frieke.kuper@kpnmail.nl.
2 Professor of Environmental Medicine and Urology, Pathology Department, University of Illinois, 909 South Wolcott Ave, Chicago, USA. Electronic address: Boslandm@uic.edu.