1. Allen, W. H. (1937). J. Amer. med. Ass., 108, 2037.
2. Ayman, D., Rosenblum, H., and Falcon-Lesses, M. (1932). Ibid., 98, 1721.
3. Baratz, J. J., and Bronstein, I. P. (1942). Amer. J. Dis. Child., 64, 471.
4. Benestad, G. (1937). Nor. med. Tdskr., 14, 1741.
5. Bronstein, I. P., and Baratz, J. J. (1936). Amer. J. Dis. Child., 52, 128.