Figure 4. Flow of patients through the study.*Represents patients in routes F4, F6 in Figure 2. **Represents patients in routes C4, C5, E2, E3, E4, E6 in Figure 2. ***Number of post-CT diagnoses correct at follow up. Represents patients in routes A5, A6, B5, B6 in Figure 2 and is the number of admitting diagnoses correct at follow up.