References
- Berner J, Kiar T. Scand J Gasteroenterol 1986; 21: 188–192
- Sinclair T S, et al. Gastroenterology 1983; 85: 1–11
- Bjornsson S, Thorgeirsson T. Nord Med 1983; 98: 1
- Skarstein A, et al. Scand J Gastroenterol 1982; 17(suppl 18)349
- Odes H S, et al. Gut 1987; 28: 1630–1636
- Vestergaard T, Zachariassen P. Frooskaparrit 1987; 33