DOI: 10.1055/s-00000094

Zeitschrift für Gastroenterologie

References

Schlick van T, Heintz A, Junginger T.
The examiner’s learning effect and its influence on the quality of endoscopic ultrasonography in carcinoma of the esophagus and gastric cardia. 
Surg Endosc 1999; 13 (9): 894-898  

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