1. Department of Biomedical Computer Science and Mechatronics; Institute for Biomedical Image Analysis; UMIT; Hall Tyrol 6060 Austria
2. Department of Experimental and Clinical Medicine; Magna Graecia University of Catanzaro; Catanzaro 88100 Italy
3. Department of Radiation Oncology; Massachusetts General Hospital; Harvard Medical School; Boston MA 02114 USA
4. Merck and Co., Inc.; West Point PA 19422 USA
5. Department of Electrical Engineering and Computer Science; Vanderbilt University; Nashville TN 37235 USA
6. Varian Medical Systems; Baden 5404 Switzerland
7. University of Basel; Basel 4001 Switzerland
8. Fraunhofer; 64283 Darmstadt Germany
9. Imorphics Ltd.; Kilburn House Manchester Science Park Manchester M15 6SE UK
10. Signal Processing and Recognition Group; Universidad Nacional de Colombia; Colombia
11. University of Washington; Seattle WA 98105 USA