1 Centre for Synaptic Plasticity, School of Physiology, Pharmacology and Neuroscience, Dorothy Hodgkin Building, University of Bristol, Bristol, BS1 3NY, UK; Department of Physiology, University of Toronto, Toronto, Ontario, M5S1A8, Canada; Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario M5G 1X5, Canada.
2 Centre for Synaptic Plasticity, School of Physiology, Pharmacology and Neuroscience, Dorothy Hodgkin Building, University of Bristol, Bristol, BS1 3NY, UK.
3 NINDS, NIH, Bethesda MD 20892, USA.
4 Dept Biology, Brandeis University, Waltham, MA 02453, USA.
5 School of Life Sciences, University of Warwick, Coventry, CV4 7AL, UK. Electronic address: [email protected].