1. Gerald, P. S., Warner, S., Singer, J. D., Corcoran, P. A., and Umansky, I., J. Clin. Invest., 43, 1297 (1964).
2. Bloom, G. E., Gerald, P. S., and Reisman, L. E., Science, 156, 1746 (1967).
3. Gerald, P. S., Warner, S., Singer, J. D., Corcoran, P. A., and Umansky, I., J. Pediat., 70, 172 (1967).
4. Cook, P. J. L., Gray, J. E., Brack, R. A., and Robson, E. B., Ann. Hum. Genet. (in the press).
5. Summit, R. L., Amer. J. Hum. Genet., 18, 172 (1966).