1. Dept. of Epidemiology and Community Medicine, University of Antwerp, Antwerpen.
2. Dept. of Emergency and Traumatology, St-Dimpna, Geel; Antwerpen.
3. Dept. of Surgery, UZ Leuven, Leuven; Antwerpen.
4. Institute for Medical History, University of Antwerp, Antwerpen.