References
- Littenberg G, Afroudakis A, Kaplowitz N. Medicine 1979; 58: 385–412
- Scott J, Summerskill J A, Elias E, Dick R, Sherlock S. Gut 1977; 18: 196–201
- Segal J, Lawson H H, Rabinowitz B, Hamilton D G. Am J Gastroenterol 1982; 77: 867–874
- Ballard H, Bernstein M, Farrar J T. Am J Med 1961; 30: 196–201
- Uchida T, Kao H, Quispe-Sjogren M, Peters R L. Gastroenterology 1983; 84: 683–692
- Phillips G B, Davidson C S. Gastroenterology 1957; 33: 237–244
- Sateline L R, Matre W J. Am J Med 1963; 35: 323–342
- Dutta S K, Mobrahan S, Iber F L. Am J Dig Dis 1978; 23: 618–622
- Van Thiel D H, Lipsitz H D, Porter L E, Schade R R, Gottlieb G P, Graham T O. Gastroenterology 1981; 81: 594–615
- Snape W J, Long W B, Trotman B W, Marin G A, Czaja A J. Gastroenterology 1976; 70: 70–73
- Sarles H, Sahel J. Gut 1978; 19: 851–857
- Warshaw A L, Schapiro R H, Ferrucci J T, Galdabini J J. Gastroenterology 1976; 70: 562–567
- Ammann R W, Akovbiantz A, Largiadèr F, Schueler G. Gastroenterology 1984; 86: 820–828
- Ammann R W, Buehler H, Haecki W, Schmid M. Lancet 1982; 1: 1312
- Sachs L. Angewandte Statistik. 3rd ed. Springer Verlag, Berlin 1974
- Morgan M Y, Sherlock S, Scheuer P J. Scand J Gastroenterol 1978; 13: 299–303
- Harinasuta U, Zimmermann H J. Gastroenterology 1971; 60: 1036–1046
- DeRitis F, Coltorti M, Giusti G. Lancet 1972; 1: 685–687
- Cohen J A, Kaplan M M. Dig Dis Sci 1979; 24: 835–838
- Specht H J, Liehr H. Z Gastroenterol 1983; 21: 89–96
- Matloff D S, Mitchell J S, Kaplan M M. Gastroenterology 1980; 78: 1389–1392
- Diehl A M, Potter J, Boitnott J, Van Dugn M A, Herlong H F, Mezey E. Gastroenterology 1984; 86: 632–636
- Yadegar J, Russel A W, Passaro E, Samuel E W. Arch Surg 1980; 115: 582–586
- Schulte W J, LaPorta A J, Condon R E, Unger G F, Geenen J E, De Cosse J J. Surgery 1977; 82: 303–309
- Wisloff F, Jakobsen J, Osnes M. Br J Surg 1982; 69: 52–54
- Teschke R, Neuefeind M, Nishimura M, Strohmeyer G. Gut 1983; 24: 625–630
- Vennes J A, Bond J H. Gastroenterology 1983; 84: 1615–1618
- O'Connor K W, Snodgrass P J, Swonder J E, Mahoney S, Burt R, Cockerill E M, Lumeng L. Gastroenterology 1983; 84: 1498–1504
- Matzen P, Malchow-Moller A, Brun B, Gronvall S, Haubek A, Heuriksen J H, Laursen K, Lejerstofte J, Stage P, Winkler K, Juhl E. Gastroenterology 1983; 84: 1492–1497
- Cronan J J, Mueller P R, Simeone J F, O'Conell R S, van Sonnenberg E, Wittenberg J, Ferrucci J T. Radiology 1983; 146: 467–469
- Gross B H, Harter L P, Gore R M, Callen P W, Filly R A, Shapiro H A, Goldberg H I. Radiology 1983; 146: 471–474
- Laing F C, Jeffrey R B. Radiology 1983; 146: 475–479
- Afroudakis A, Kaplowitz N. Hepatology 1981; 1: 65–72
- Scharschmidt B F, Goldberg H I, Schmid R. N Engl J Med 1983; 308: 1515–1519