1. Moon, V. H.: Am. J. Med. Sci., 177, 681, 1929; Arch. Path., 13, 691, 1932.
2. Mann, F. C., and Bollman, J. L.: Arch Path., 1, 681, 1926.
3. McNee, J. W.: Brit. Med. J., 1, 1017, 1068, 1111, 1932.
4. Ratnoff, O. D., and Patek, A. J., Med. Vol. 21, 1942, p. 221.
5. Barker, L.: Intern. Clinics, 1, 17, 1929.