Screening for bladder cancer.  The challenge: identifying who might benefit most from screening.
D000368:Aged; D003362:Cost-Benefit Analysis; D006801:Humans; D008403:Mass Screening / Q000191:economics*; D008875:Middle Aged; D018579:Patient Selection; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects; D001749:Urinary Bladder Neoplasms / Q000175:diagnosis* / Q000191:economics*