Powell, J T; Sweeting, M J; Ulug, P; Blankensteijn, J D; Lederle, F A; Becquemin, J-P; Greenhalgh, R M; Greenhalgh, R M; Beard, J D; Buxton, M J; Brown, L C; Harris, P L; Powell, J T; Rose, J D G; Russell, I T; Sculpher, M J; Thompson, S G; Lilford, R J; Bell, P R F; Greenhalgh, R M