1. ADAMS, J. M. (1943),.. Pediat., 23, 189. BLOXSOM, A. (1953), Amer.
2. , BOUTOURLINE-YOUNG, H. J., and SMITH, C. A. (1950), Amer. J. Dis. Child., 80, 753.
3. BROWNE, F. J. (1922), Brit. med. 7., i, 469, 2, 590.
4. BROWNE, F. J. (1921), Edinb. med. J., 27, 153.
5. CLAIREAUX, A. E. (1953), Lancet, ii, 749.