Journal of Epidemiology and Community Health 35(1): 35-38, 1981.
Cartwright RA, Gadian T, Garland JB, et al.
The influence of urinary malignant cell cytology screening has been explored in an industrial population. Survival was prolonged in the screened group partly because a greater proportion of early stages disease was being diagnosed, and partly because of other differences in the screened group which have yet to be defined.
Rheinische Friedrich- Wilhelms- Universität Bonn