Opioid-Free Anesthesia (OFA): Evidence, Controversies, and Limits in Perioperative Practice. - Trejos Román, Miguel Caled; Solís Marín, María José; Delgado Angulo, Yakira; Duarte Molina, Yoysi Leilani; Vega Vega, Isis Karolina; Serrano Jiménez, Stephanie Paola (International Archives of Integrated Medicine, 2026)