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2. Amb3rg, S., Ant. J. Dis. Child., Chicago, 1929, XXXVII, 335.
3. Klemperer, P., & Otani, S., Arch. Path., Chicago, 1931, XI, 71.
4. Murphy, F. D., & Grill, J., Arch. Int. Med., Chicago, 1930, XLVI, 75.
5. Fishberg, A. M., & Oppenheimer, B. S., Ibid., 1930, XLVI, 901.