1. Adamkiewicz, V.W., W. B. Rice andJ. D. McColl: J. Biochem. Physiol.33, 332 (1955).
2. Adler, G.: Delaware St. Med. J.28, 92 (1956).
3. Alcindor, J.: Brit. Med. J.1908, 79.
4. Baetzner, W.: Arch. klin. Chir.95, 89 (1911).
5. Bainbridge, W. S.: N. Y. Med. J.85, 385 (1907).