1Department of Bioengineering, Imperial College London, South Kensington, London SW7 2AZ, UK
2Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
3Institut Curie, Section de Recherche, Plate-forme d'Imagerie Cellualire et Tissulaire, CNRS UMR 3348, Centre Universitaire, Bât. 112, Orsay 91405, France
4OptiNav Inc., Redmond, WA, USA
5Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02445, USA
6Department of Neurobiology and Genetics, University of Würzberg, Germany
7Structure and Motion Laboratory, The Royal Veterinary College, North Mymms, Hatfield, Hertfordshire AL9 7TA, UK