REFERENCES
- de Dombal, F. T., Lcaper, D. J., Staniland, J. R., McCann, A. P. & Horrocks, Jane C. Brit. med. J. 1972, 2, 9–13.
- de Dombai, F. T., Lcaper, D. J., Horrocks, Jane C., Staniland, J. R. & McCann, A. P. Brit. med. J. 1974, 7, 376–380.
- de Dombal, F. T., Horrocks, Jane C., Walmsley, G. R. & Wilson, P. D. J. roy. Coll. Phycns Lond. 1975. In press.
- de Dombal, F. T., Clamp, Susan E., Leaper, D. J., Staniland, J. R. & Horrocks, Jane C. Gastroenterology 1975. In press.
- de Dombal, F. T. & Staniland J. R. 1975. Unpublished data.
- Dudley, H. A. F. Lancet 1969, 2, 723–726.
- Edwards, D. A. W. Scot. med. J. 1970, 15, 378–381.
- Emerson, P. A., Teather, D. & Handley, A. J. Quart. J. Med. 1974, 171, 389–398.
- Horrocks, Jane C. & de Dombal, F. T. Amer. J. dig. Dis. 1975. In press.
- Jennett, B., Teather, D. & Bennie, Susan. Lancet 1973, 2, 652–654.
- Knill-Jones, R. P. J. roy. Coll. Phycns Lond. 1975. In press.
- Knill-Jones, R. P., Stern, R. B., Girmes, D. M., Maxwell, D. J., Thompson, R. P. H. & Williams, Roger. Brit. med. J. 1973, 1, 530–533.
- Lennard-Jones, J. E. & Spicer, C. C. J. roy. Coll. Phycns Lond. 1975. In press.
- Lusted, L. B. In Introduction to Medical Dccision-Makiitg. C. C. Thomas, Illinois, 1966.
- Scheinok, P. A. & Rinaldo, J. A. R. Comp. Biomed. Research 1967, 1, 221–236.
- Stern, R. B., Knill-Jones, R. P. & Williams, Roger. Brit. med. 1. 1973, 1, 533–544.
- Teather, D. J. roy. Coll. Phycns Lond. 1975. In press.
- Whittaker, M., Rector, A. L., de Dombal, F. T. & Golighcr, J. C. Brit. 1. Surg. 1974, 61, 922.