1. Reed, Amer. J. Med. Sci., Philadelphia, 1902, CXXIV, 653.
2. Treadgold, C. H., Quart. Jour. Med. Oxf., 1908, I, 239. 3 Ward. G. R., Proc. R. Soc. Med., 1912, V, Medic. Sect. 72.
3. Acuna, Arch (le med. des E?uf., 1906, IX, 321.
4. Babonneix and Tixier, Ibid, 1909, XII, 662.
5. Bartlett, Amer. J. Dis. Child., 1924, XXVITT, 256.