1. (a) Moncada, S.; Palmer, R. M. J.; Higgs, E. A. Pharmacol. Rev.1991, 43, 109;
2. (b) Feldman, P. L.; Griffith, O. W.; Stuehr, D. J. Chem. Eng. News1993, 71, 10, 26;
3. (c) Butler, A. R.; Williams, D. L. Chem. Soc. Rev.1993, 233;
4. (d) Methods in Nitric Oxide Research; Feelisch M.; Stamler, J. S. Eds., John Wiley and Sons, Chichester, England, 1996, and references therein;
5. (e) Wink, D. A.; Hanbauer, I.; Grisham, M. B.; Laval, F.; Nims, R. W.; Laval, J.; Cook, J.; Pacelli, R.; Liebmann, J.; Krishna, M.; Ford, P. C.; Mitchell, J. B. Curr. Top. Cell. Regul.1996, 34, 159