1. Institute of Biomedical EngineeringUniversity of Oxford Oxford, U.K.
2. Guy's & St. Thomas HospitalLondon, U.K.
3. Centre for Vision, Speech and Signal ProcessingUniversity of Surrey Guildford, U.K.
4. Mechanical EngineeringImperial College London London, U.K.
5. United States Food & Drug AdministrationCenter for Devices and Radiological HealthRockville MD20852