1. Davis, M. E. and Hulit, B. E. (1949). J. clin. Endocr., 9, 714.
2. Discombe, G. (1946). Lancet, 1, 195.
3. Forkner, C. E. (1929). Bull. Johns Hopk. Hosp., 45, 75.
4. Klein, R. and Hanson, J. (1950). Pediatrics, 6, 192.
5. Lanrs, H. (1907). C. R. Soc. Biol. Paris, 62, 489.