1. Barchas JD, Sullivan S (1982) Opioid peptides as neuroregulators: potential areas for the study of genetic-behavioral mechanisms. Behav Genet 12:69?91
2. Brase DA, Loh HH, Way EL (1977) Comparison of the effects of morphine on locomotor activity, analgesia and primary and protracted physical dependence in six mouse strains. J Pharmacol Exp Ther 201:368?374
3. Bruell JH (1962) Dominance and segregation in the inheritance of quantitative behavior in mice. In: Bliss EL (ed) Roots of behavior. Harper & Brothers, New York, pp 48?67
4. Castellano C, Oliverio A (1975) A genetic analysis of morphine-induced running and analgesia in the mouse. Psychopharmacologia 41:197?200
5. Conway EL, Brown MJ, Dollery CT (1983) Plasma catecholamine and cardiovascular responses to morphine and D-ala2-D-leu5-enkephalin in conscious rat. Arch Int Pharmacodyn Ther 265:244?258