1. Waardenburg, P. J. Am. J. hum. Genet. 3, 195–253 (1951).
2. Arias, S. Birth Defects 7, 87–101 (Williams & Wilkins, Baltimore, 1971).
3. Foy, C., Newton, V. E., Wellelley, D., Harris, R. & Read, A. P. Am. J. hum. Genet. 46, 1017–1023 (1990).
4. Auerbach, R. J. exp. Zool. 127, 305–329 (1954).
5. Epstein, D. J., Malo, D., Vekemans, M. & Gros, P. Genomics 10, 89–93 (1991).