1. Complex Systems and Computational Neuroscience Group; Wigner Research Center for Physics, Hungarian Academy of Sciences; Budapest H-1121 Hungary
2. Department of Anatomy, Histology, and Embryology; Semmelweis University Medical School; Budapest H-1094 Hungary
3. Department of Psychology; Vanderbilt University; Nashville Tennessee 37240-7817
4. Department of Mathematical Sciences; University of Montana; Missoula MT 59812
5. Faculty of Information Technology; Pázmány Péter Catholic University; Budapest H-1083 Hungary
6. Department of Radiology and Radiological Science; Institute of Imaging Science; Vanderbilt University Medical Center; Nashville Tennessee 37232