1. Ingram, V. A. Nature 178, 792 (1956).
2. Serjeant G. R. Sickle Cell Disease (Oxford University Press, 1985).
3. Schechter, A. N., Noguchi, C. T. & Rodgers, G. P. in The Molecular Basis of Blood Diseases (eds Stamatoyannopoulos, G., Nienhuis, A, W., Leder, P. & Majerus, P. W.) 179–218 (W. B. Saunders, Philadelphia, 1987).
4. Luzzatto, L. & Goodfellow, P. Nature 337, 17–18 (1989).
5. Grosveld, F., Blom van Assendelft, G., Greaves, D. R. & Kollias, G. Cell 51, 975–985 (1987).