1. CNS Research, Eli Lilly & Company, Lilly Research Centre, Windlesham, Surrey, GU20 6PH, United Kingdom
2. Department of Anatomy, Faculty of Basic Medical Sciences, Queen Mary & Westerfield College, London, E1 4NS, United Kingdom
3. Department of Physiology, UMDS, St Thomas's Hospital, London, SE1 7EH, United Kingdom