Molinari S, Camarda V, Rizzi A, Marzola G, Salvadori S, Marzola E, Molinari P, McDonald J, Ko MC, Lambert DG, Calo' G, Guerrini R. [Dmt1]N/OFQ(1-13)-NH2: a potent nociceptin/orphanin FQ and opioid receptor universal agonist. Br J Pharmacol. 2013 Jan; 168(1):151-62.