1. Szeinberg, A., and Sheba, C., Israel Med. J., 17, 158 (1958).
2. Larrizza, P., Brunetti, P., Grignani, F., and Ventura, S., Haematologica, 43, 205 (1958).
3. Childs, B., and Zinkham, W., in Biochemistry of Human Genetics, edit. by Wolstenholme and O'Connor, 76 (1959).
4. Marks, P. A., and Gross, R. T., Bull. N.Y. Acad. Med., 35, 433 (1959).
5. Beutler, E., The Metabolic Basis of Inherited Disease, edit. by Stanbury, Wyngaarden and Fredrickson, 1031 (McGraw-Hill, New York, 1960).