1. Birkmayer, W., and Hornykiewicz, O., Arch. Psychiat. Nerv. Krankh., 203, 560 (1962).
2. Barbeau, A., Murphy, G. F., and Sourkes, T. L., in Monoamines et Système Nerveux Central, 247 (edit. by de Ajuriaguerra, J.) (Masson, Paris, 1962).
3. Cotzias, G. C., Van Woert, M. H., and Schiffer, L. M., New Engl. J. Med., 276, 374 (1967).
4. Calne, D. B., and Sandler, M., Nature, 226, 21 (1970).
5. Sourkes, T. L., Proc. Symp. Biochem. Chemother. Parkinson's Disease, 157th National Meeting Amer. Chem. Soc. April 1969, Minneapolis, Minnesota.