Fibreoptic gastroduodenoscopy.
D003365:Costs and Cost Analysis; D003906:Developing Countries; D004386:Duodenum; D019723:Endoscopes; D004724:Endoscopy / Q000379:methods; D005336:Fiber Optic Technology; D020699:Gastroscopes; D005773:Gastroscopy / Q000379:methods; D006761:Hospitals; D006801:Humans