DOI:
10.1055/s-00000094
Zeitschrift für Gastroenterologie
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References
Classen M.
Two Centuries of Digestive Tract Endoscopy: A concise Report.
In: Classen M, Tytgat GNJ, Lightdale CJ.
Gastroentorology Endoscopy.
Thieme Verlag; 2010: 2-13
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