1 Centre for Medical Image Computing (CMIC), Department of Medical Physics and Bioengineering, University College London, London, UK. h.pemberton@ucl.ac.uk.
2 UCL Queen Square Institute of Neurology, University College London, London, UK. h.pemberton@ucl.ac.uk.
3 Dementia Research Centre, UCL Queen Square Institute of Neurology, University College London, London, UK. h.pemberton@ucl.ac.uk.
4 Department of Radiology and Nuclear Medicine, Erasmus MC University Medical Center, Rotterdam, The Netherlands.
5 Centre for Medical Image Computing (CMIC), Department of Medical Physics and Bioengineering, University College London, London, UK.
6 UCL Queen Square Institute of Neurology, University College London, London, UK.
7 Clinical, Educational and Health Psychology, University College London, London, UK.
8 Radiology & Nuclear Medicine, VU University Medical Center, Amsterdam, The Netherlands.
9 Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, The Netherlands.