1. Baldessarini, R. J., and Carbone, P., Science, 149, 644 (1965).
2. Bell, W., and Carbone, P. (in preparation).
3. Fallon, H. J., Frei III, E., Davidson, J. D., Trier, J. S., and Burk, D., J. Lab. Clin. Med., 51, 860 (1958).
4. Axelrod, J., and Tomchick, R., J. Biol. Chem., 233, 702 (1958).
5. D'Iorio, A., in Methods in Medical Research, edit. by Quastel, J. H., 9, 208 (Year Book Med. Pub. Co., Chicago, 1961).