1. Inst. of Comput. Sci., FORTH, Heraklion, Greece
2. PHILIPS Res. Eur., Eindhoven, Netherlands
3. Dept. of Comput. Sci. & Technol., Univ. of Bedfordshire, Luton, UK
4. Eur. Inst. of Oncology, Milan, Italy
5. Dept. for Pediatric Oncology & Hematology, Saarland Univ. Hosp., Homburg, Germany
6. Promotion Software GmbH, Berlin, Germany