1. Nyman, M., Scand. J. Clin. and Lab. Invest., Supp. No. 39, 11 (1959).
2. Liang, C. C., Biochem. J., 66, 552 (1957).
3. Jayle, M. F., Boussier, G. C., and Batias, M. J., C.R. Soc. Biol., 149, 46 (1955).
4. Connell, G. E., and Smithies, O., Biochem. J., 72, 115 (1959).
5. Smithies, O., Biochem. J., 71, 585 (1959).