REFERENCES
- Asnaes, S. & Johansen, Aa. Acta Path. Microbiol. Scand. Sect. A. 1975, 83, 737–738
- Creutzfeldt, W., Arnold, R., Creutzfeldt, C. & Track, N. S. Gut 1976, 17, 745–754
- Joske, R. A., Finkh, E. S. & Wood, I. J. Quart. J. Med. 1955, 24, 269–294
- Keuppens, F., Willems, G., Vansteenkiste, Y. & Woussen-Colle, M. C. Surg. Gynec. Obstet. 1978, 146, 400–406
- Lambert, R. Digestion 1972, 7, 83–126
- Magnus, H. A. J. Path. Bact. 1946, 58, 431–439
- Motteram, R. J. Path. Bact. 1951, 63, 389–394
- Rao, S. S., Krasner, N. & Thomson, T. J. J. Path. 1975, 117, 93–96
- Siurala, M. Ann. Med. Int. Fenn. 1956, 45, 67–90
- Siurala, M., Erämaa, E. & Nyberg, W. Acta Med. Scand. 1960, 166, 213–223
- Siurala, M., Isokoski, M., Varis, K. & Kekki, M. Scand. J. Gastroent. 1968, 3, 211–223
- Siurala, M. & Salmi, H. J. Scand. J. Gastroent., 1971, 6, 459–463
- Siurala, M., Varis, K. & Wiljasalo, M. Scand. J. Gastroent. 1966, 1, 40–48
- Siurala, M. & Vuorinen, Y. Acta Med. Scand. 1963, 173, 45–52
- Stave, R. & Brandtzaeg, P. Scand. J. Gastroent. 1976. 11, 705–712
- Stave, R. & Brandtzaeg, P. Scand. J. Gastroent. 1977, 12, 885–891
- Stave, R. & Brandtzaeg, P. Scand. J. Gastroent. 1978, 13, 199–203
- Stave, R., Brandtzaeg, P., Myren, J. & Gjone, E. Scand. J. Gastroent. 1978, 13, 293–298
- Stave, R., Brandtzaeg, P., Nygaard, K. & Fausa, O. Scand. J. Gastroent. 1978, 13 685–691
- Strickland, R., Fischer, J., Lewin, K. & Taylor, K. Gut 1973, 14, 13–19
- Tatsuda, M. & Okuda, S. Gastroenterology 1975, 69, 897–902
- Te Velde, K., Hoedemaker, P. J., Anders, G. J. P., Arends, A. & Nieweg, H. O. Gastroenterology 1966, 51, 138–148
- Whitehead, R., Truelove, S. C. & Gear, M. W. J. Clin. Path. 1972, 25, 1–11