1. Brines. O. A. and Jennings, E. R. (1948). Amer. J. Path., 24. 1167.
2. Cahill, G. F. (1948). J. Amer. med. Ass., 138, 180. Coupland, R. E. (1952).
3. Daeschner, C. W., Moyer. J. H. and Able, L. W. (1954). J. Pediat..
4. Goldenberg, M., Snyder, C. H. and Aranow, H. (1947). J. Amer.
5. Hubble, D. (1951). Archives of Disease in Childhood, 26, 340. Labb*, M., Tinel, J. and [)oumer, A. (1922). Bull. Soc. med. H6p., Paris, 3 ser., 46, 982.