Salvage cytology: a new alternative fiberoptic technique.
D001706:Biopsy; D003581:Cytodiagnosis; D019723:Endoscopes; D004724:Endoscopy / Q000379:methods*; D020701:Esophagoscopes; D004945:Esophagoscopy / Q000379:methods; D005336:Fiber Optic Technology / Q000295:instrumentation; D020699:Gastroscopes; D006801:Humans