Nature · 1980 · 617 citations · 25 references
Health SciencesFunctional SelectivityPain MedicineNeuroanatomyPhysiologyMultiple Opiate ReceptorMedicineMolecular PainNervous SystemPharmacologyOpioid Use DisorderPain Research
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Endogenous opioid peptides: multiple agonists and receptors
John A.H. Lord, Angela A. Waterfield, John Hughes et al. · Nature · 1977 · 2.5K citations
Pain Relief by Intrathecally Applied Morphine in Man
Josef K. Wang, Lee A. Nauss, Juergen E. Thomas · Anesthesiology · 1979 · 939 citations · Full text