Affiliation: | (1) Present address: Mathematics Department, Newcastle University, 2308, New South Wales, Australia;(2) Present address: Norsk Regnesentral, Forskningsveien 1B, Blindern, Oslo 3, Norway;(3) Present address: Department of Radiology, School of Medicine, Loma Linda University, 92354 Loma Linda, California, USA;(4) King's College Research Centre, King's College, CB2 1ST Cambridge, England;(5) IBM A/S, Vika, Oslo 1, Norway;(6) Department of Radiology School of Medicine, Loma Linda University, Loma Linda, California, USA |