References
- Sorgi M, Wolverson R L, Mosimann F, Donovan I A, Alexander-Williams J, Harding LK. Scand J Gastroenterol 1984; 19: 30–33, suppl 92
- Emås S, Lilja B, Borg I. Scand J Gastroenterol 1969; 4: 151–156
- Hoare A M, Keighley M RB, Starkey B, Alexander-Williams J. Gut 1978; 19: 166–169
- Kalima T, Matianinen M, Taavitsainen M. Scand J Gastroenterol 1981; 16: 37–41, suppl 67
- Svenberg T, Christofidis N D, Fitzpatrick M L, Areola-Ortiz F, Bloom S R, Welbourn RB. Gut 1982; 23: 1024–1028
- Wormsley R. Gut 1972; 13: 243–250
- Wolverson R L, Sorgi M, Mosimann F, Donovan I A, Harding L K, Alexander-Williams J. Scand J Gastroenterol 1984; 19: 41–43, suppl 92
- Tolin R D, Malmud L S, Stelzer F, Menin R, Makler PT, Jr, Applegate G, Fisher RS. Gastroenterology 1979; 77: 1027–1033
- Niemelä S. Scand J Gastroenterol 1985; 20: 1–56, suppl 115