1. Tapia, F. A., Dustan, H. P., Schneckloth, R. E., Corcoran, A. C., and Page, I. H., Lancet, ii, 831 (1957).
2. Freis, E. D., Wanko, A., Wilson, I. M., and Parrish, A. E., Ann. N.Y. Acad. Sci., 71, 450 (1958).
3. Hollander, W., Chobanian, A. V., and Wilkins, R. W., Circ., 19, 827 (1959).
4. Preziosi, P., Bianchi, A., Loscalzo, B., and De Schaepdryver, A. F., Arch. internat. pharmacodyn., 118, 467 (1959).
5. Rubin, A. A., Beauregard, S. C., and Freeman, B. G., Fed. Proc., 19, 101 (1960).