REFERENCES
- Anthonisen, P. & Riis, P. 1961. A new diagnostic approach to mucosal inflammation in proctocolitis. Lancet ii, 81–82.
- Anthonisen, P. & Riis, P. 1962. The cytology of colonic secretion in proctosigmoidal disease. Acta med. scand. 172, 375–381.
- Riis, P., Valdorf-Hansen, F. & Anthonisen, P. 1966. Cytology of colonic mucosal secretions from patients with non-specific haemorrhagic proctocolitis in complete clinical remission. Brit. med. J. 1, 712–714.
- Riis, P. & Anthonisen, P. 1971. Unpublished results.
- Wulff, H. R. 1970. Formelle problemer ved diagnostik og sygdomsklassifikation. Bibl. Læger. 162, 133–184.