Institution: | (1) Oxford Research Systems Limited, Nuffield Way, OX14 1RY Abingdon, Oxon, (England);(2) Department of Plant Sciences, University of Oxford, Agricultural Science Building, Parks Road, OX1 3PF Oxford, (England);(3) Present address: MR Physics, Philips Medical Systems, P.O. Box 10 000, Best, (The Netherlands) |