Affiliation: | 1. Centre for Cancer Prevention, Wolfson Institute of Preventive Medicine, Queen Mary University of London, London, EC1M 6BQ, United Kingdom;2. School of Mathematics, University of Leeds, Leeds, LS2 9JT, United Kingdom;1. Depto. Matemáticas, Facultad de Ciencias, Universidad Autónoma de Madrid and Instituto de Ciencias Matemáticas CSIC-UAM-UC3M-UCM, Canto Blanco, 28049 Madrid, Spain;2. Depto. Matemática Aplicada, and IMUVA, Instituto de Matemáticas, Universidad de Valladolid, Spain |