Comparisons of three methods of collecting cytology specimens with the Olympus fiberscope.
D003581:Cytodiagnosis / Q000379:methods*; D004724:Endoscopy; D004938:Esophageal Neoplasms / Q000175:diagnosis*; D005336:Fiber Optic Technology / Q000295:instrumentation*; D006801:Humans; D013274:Stomach Neoplasms / Q000175:diagnosis*