Institution: | a Max Planck Institute for Mathematics in the Sciences, Inselstrasse 22-26, 04103 Leipzig, Germany b Auckland Cancer Society Research Centre, Faculty of Medical and Health Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand c Centre for Mathematics in Industry, Massey University at Albany, Private Bag 102 904, North Shore MC, Auckland, New Zealand d Department of Mathematics and Statistics, University of Canterbury, Private Bag 4800, Christchurch, New Zealand |