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BENEKLİ, Mustafa; BAYRAKTAR, Yusuf; KAYHAN, Burhan. ENDOGENOUS OPIOID REPTIDES ENDORPHINES. Turkish Journal of Gastroenterology, [S. l.], v. 5, n. 4, p. 770–775, 1994. Disponível em: https://www.turkjgastroenterol.org/index.php/tjg/article/view/554. Acesso em: 1 jan. 2026.