REFERENCES
- Brandsborg, O., Brandsborg, M., Lovgreen, A., Mikkelsen, K., Moeller, B., Rokkjaer, M. & Amdrup, E. Gastroenterology 1977, 72, 212–214
- Clarke, R. J. & Alexander-Williams, J. Gut 1973, 14, 300–307
- Faxén, A., Alpsten, M., Cederblad, A., Kewenter, J. & Rossander, L. Scand. J. Gastroent. 1978, 13, 727–733
- Faxén, A. & Kewenter, J. Scand. J. Gastroent. 1978, 13, 545–550
- Faxén, A., Kewenter, J. & Kock, N. G. Scand. J. Gastroent. 1978, 13, 551–556
- Howlett, P. J., Scheiner, H. J., Barber, D. C., Ward, A. S., Perez-Avila, C. A. & Duthie, H. L. Gut 1976, 17, 542–550
- Jahnberg, T. Scand. J. Gastroent. 1977, 12, Suppl. 46
- Jahnberg, T., Martinson, J., Hultén, T. & Fasth, S. Scand. J. Gastroent. 1975, 10, 593–598
- Liavaag, I. & Roland, M. Scand. J. Gastroent. 1979, 14, 49–56
- Stadaas, J. O. Scand. J. Gastroent. 1975, 10, 129–134
- Stadaas, J. O. & Aune, S. Acta Chir. Scand. 1970, 136, 611–615
- Wilbur, B. G. & Kelly, K. A. Ann. Surg. 1973, 178, 295–303
- Wilkinson, A. R. & Johnston, D. Gastroenterology 1973, 178, 190–193