REFERENCES
- Kirk AP. Summerfield JA. Digestion 1980, 20. 31–35
- Osnes M. Løtveit T. Larsen S. Aune S. Scand J Gastroenterol 1981, 16. 103–107
- Osnes M. Myren J. Løtveit T. Scand J Gastroenterol 1977, 12. 347–351
- Pinotti HW, Tacla M. Pontes JF, Bettarello A. Digestion 1971, 4, 353–361
- Spny S van der. Endoscopy 1979, 9. 31–35
- Weiss W. In: Classen M, Geenen J, Kawai K. eds. The papilla Vateri and its diseases. Verlag Witzstrock, Baden-Baden, 1979, 32–40
- La Morte WW, Schaetz DJ Jr, Birkett DH, Williams LF Jr. Gastroenterology 1979, 77. 580–592
- Sarles JC, Midejean A. Devaux MA. Am J Gastroenterol 1975, 63, 221–234
- Takeuchi M, Miyaji M, Goto K. Stomach Intestine 1975, 10. 737–742
- Løtveit T, Osnes M. Aune S. Larsen S. Scand J Gastroenterol 1980, 15, 875–880
- Funch-Jensen P. Csendes A, Kruse A, Øster MJ. Scand J Gastroenterol 1979, 14. 253–256
- Csendes A. Kruse A. Funch-Jensen P. øster MJ. Ørnshalt J. Amdrup E. Gastroenterology 1979, 77. 1203–1210
- Geenen JE. Hogan WJ. Dodds WJ. Stewart ET, Arndorfer RC. Gastroenterology 1980, 78. 317–324
- Viceconte G. Gut 1983, 24. 20–27
- Viceconte G, Viceconte GW. Pietropaolo V, Dell' Anna A. Bogliolo G. G Ital End Dig 1981, 4. 309–322
- Løtveit T, Osnes M. Aune S. Scand J Gastroenterol 1978, 13. 93–95
- Løtveit T, Scand J Gastroenterol 1982, 17. 653–656