REFERENCES
- Arminski, T. C. & McLean, D. W. Dis. Colon Rect. 1964, 7, 249–261
- Axtell, L. M. & Chiazze, L. Cancer 1966, 19, 750–754
- Blatt, L. J. Dis. Colon Rect. 1961, 4, 277–282
- Cancer Incidence in Sweden 1969-1976. National Board of Health and Welfare, Stockholm, 1973, 1973, 1975, 1977, 1979, 1980, 1980
- Chapman, I. Ann. Surg. 1963, 157, 223–226
- Correa, P., Strong, J. P., Reif, A. & Johnson, W. D. Cancer 1977, 39, 2258–2264
- Eide, T. J. & Stalsberg, H. Cancer 1978, 42, 2839–2848
- Ekelund, G. Acta Path. Microbiol. Scand. 1963, 59, 165–170
- Ekelund, G. & Lindstroem, C. Gut 1974, 15, 654–663
- Enquist, I. F. Surgery 1957, 42, 681–688
- Enterline, H. T., Evans, G. W., Mercado-Lugo, R., Miller, L. & Fitts, W. T. J. Amer. Med. Ass. 1962, 179, 322–330
- Falterman, K. W., Hill, C. B., Markey, J. C., Fox, J. W. & Cohn, I. Cancer 1974, 34, 951–959
- Gabrielsson, N., Granqvist, S., Ohlsén, H. & Sundelin, P. Acta Radiol. (Stockh.) 1978, 19, 479–495
- Gillespie, P. E., Chambers, T. J., Chan, K. W., Doronzo, F., Morson, B. C. & Williams, C. B. Gut 1979, 20, 240–245
- Granqvist, S., Gabrielsson, N. & Sundelin, P. Endoscopy 1979, 1, 36–42
- Grinnel, R. S. & Lane, N. Int. Abstr. Surg. 1958, 106, 519–538
- Knoernschild, H. E. Surg. Forum 1963, 14, 137–138
- Morson, B. C. & Sobin, L. H. Histological Typing of Intestinal Tumours. WHO, Geneva, 1976
- Rhodes, J. B., Holmes, F. F. & Clark, G. M. J. Amer. Med. Ass. 1977, 238, 1641–1643
- Sato, E. Gann 1974, 65, 295–306
- Snyder, D. N., Heston, J. F., Meigs, J. W. & Flannery, J. T. Dig. Dis. 1977, 22, 791–797
- Spratt, J. S., Ackerman, L. V. & Moyer, C. A. Ann. Surg. 1958, 148, 682–698
- Vatn, M. H. & Stalsberg, H. Scand. J. Gastroent. 1977, 12, Suppl. 45, 109
- Williams, C. B., Hunt, R. H., Loose, H., Riddell, R. H., Sakai, Y. & Swarbrick, E. T. Brit. J. Surg. 1974, 61, 673–682
- Wolff, W. I., Shinya, H., Geffen, A., Ozoktay, S. & de Beer, R. Amer. J. Surg. 1975, 129, 181–186