References 

1. Balagot, R.; Ehrenpreis, S.; Kubota, K.; and Greenberg, J. Analgesia in mice and humans by D-Phenylalanine: relation to inhibition of enkephalin degradation and enkephalin levels. In: Advances in Pain Research and Therapy. Bonica, J.J. et al., eds. New York: Raven Press, 1983, 5:289-93.
2. Budd, K. "Use of D-Phenylalanine and Enkephalinase Inhibitor in the Treatment of Intractable Pain," Advances in Pain Research and Therapy J.J. Bonica et al. (ed.), Vol. 5, Raven Press, N.Y., 1983, 289-293.
3. Donzelle, G. et al. Curing trial of complicated oncologic pain by D-Phenylalanine. Anesth. Analg. 38: 655-58,1981.
4. Dove B, Morgenstern E, Gores E. [Analgesic effect, tolerance development and dependence potential of D-phenylalanine.] [Article in German.] Pharmazie.1985; 40:648-650.
5. Ehrenpreis S. Pharmacology of enkephalinase inhibitors: animal and human studies. Acupunct Electrother Res. 1985; 10:203-208.
6. Halpern LM, Dong WK. D-phenylalanine: a putative enkephalinase inhibitor studied in a primate acute pain model. Pain. 1986; 24:223-237.
7. Mann, J.; Peselow, E.D.; Snyderman, S.; and Gershon, S. D-Phenylalanine in endogenous depression. Am. J. Psychiatry, 137(12):12, 1980.
8. Walsh NE, Ramamurthy S, Schoenfeld L, Hoffman J. Analgesic effectiveness of D-phenylalanine in chronic pain patients. Arch Phys Med Rehabil. 1986; 67:436-439.

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