1. National Knowledge Service -TB Pilot, Health Protection Agency, 61
Colindale Avenue, Colindale, London NW9 5EQ, UK,
2. City eHealth Research Centre, City University, Northampton Square, London
EC1V 0HB, UK,
3. Health Protection Agency, 61 Colindale Avenue, Colindale, London NW9 5EQ,
UK,
4. Centre for Health Informatics, City University, Northampton Square,
London EC1V 0HB, UK,