THE EFFICACY OF GREATER AURICULAR NERVE (GAN) BLOCK AND AURICULOTEMPORAL NERVE (ATN) BLOCK ON FENTANYL REQUIREMENTS DURING SURGERY AND POSTOPERATIVE PAIN SCALE IN ELECTIVE MASTOIDECTOMY: A RANDOMIZED CONTROLLED TRIAL

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Author's: Rangga Ayudha, Agustina Salinding, Christrijogo Sumartono Waloejo, Lila Tri Harjana, Titiek Hidayati Ahadiah