1. and Talbott, J. H. (1940). Bull. Johns Hopk. Hosp., 66, 7.
2. Burnett, C. H., Parson, W., Reifenstein, E. C. and Roos, A. (1946). Medicine, Baltimore, 25, 399.
3. Bickel, H., Baar, H. S., Astley, R., Douglas, A. A., Finch, E., Harris, H., Harvey, C. C., Hickmans, E. M., Philpott, M. G., Smallwood W. C., Smellie, J. M. and Teall, C. G. (1952). Acta paediat., Uppsala, 42, Suppl. 90.
4. Boyd, J. D. and Steams, G. (1941). Amrier. J. Dis. Child., 61, 1012.
5. Boyd, J. D. and Steams, G. (1942). Ibid., 64, 594.