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APA Citation
Egger, K., Werner, M., Meining, A., Ott, R., Allescher, H., Höfler, H., Classen, M., & Rösch, T. (2003). biopsy surveillance is still necessary in patients with Barrett's oesophagus despite new endoscopic imaging techniques. Gut, 52(1), 18–23. http://access.bl.uk/ark:/81055/vdc_100135145910.0x000043