1. Beutler, E., Dern, R. J., Flanagan, C. L., and Alving, A. S., J. Lab. and Clin. Med., 45, 285 (1955).
2. Beutler, E., J. Lab. and Clin. Med., 49, 84 (1957).
3. Carson, P. R., Flanagan, C. L., Ickes, C. E., and Alving, A. S., Science, 124, 484 (1956).
4. Childs, B., Zinkham, W. H., Browne, E. A., Kimbro, E. L., and Torbert, J. V., Bull. Johns Hopkins Hosp., 102, 21 (1958).
5. Gross, R. T., Hurwitz, R. E., and Marks, P. A., J. Clin. Invest., 37, 1176 (1958).