Institution: | 1. Department of Computer Science, University College London, Gower Street, London WC1E 6BT, United Kingdom;2. Department of Applied Physics, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland;3. Sunnybrook Research Institute, Sunnybrook Health Sciences Centre, 2075 Bayview Ave., Toronto, Canada M4N 3M5 |