Modification of Catecholamine Release by Narcotic Analgesics and Opioid Peptides Graeme Henderson, John Hughes and Hans W Kosterlitz, 'Modification of Catecholamine Release by Narcotic Analgesics and Opioid Peptides' reprinted from D M Paton, ed., 'The Release of Catecholamines from Adrenergic Neurons' (Oxford, 1979), 217 - 228. Duplicate a photocopy of original article. 1979