The interest of ketamine as an adjuvant to fentanyl in post-tonsillectomy analgesia in children: a randomized controlled trial. - Zouche, Imen; Ketata, Salma; Kharrat, Ines; Grati, Faiza; Ayadi, Sirine; Keskes, Mariem; Derbel, Rahma; Charfeddine, Ilhem; Cheikhrouhou, Hichem (Pan African Medical Journal, 2024)