1. I. L. Bonta, Acta physiol. pharmac. neerl.8, 310 (1959).
2. I. L. Bonta andC. J. de Vos, Proceedings of the 2nd International Meeting of Angiology, Kreislauf-Bücherei, Band 21 (Dietrich Steinkopf Verlag, Darmstadt 1963).
3. I. L. Bonta andC. J. de Vos, Acta endocr., in press (1964).
4. Synthetic bradykinin was obtained through the courtesy of Prof.A. Cerletti, Sandoz AG, Basel.
5. M. Rocha e Silva andA. Antonio, Med. exp.3, 371 (1960).