Shetabi, Hamidreza, Alireza Peyman, and Farzan Piudeh. “Comparing the Effectiveness and Safety of Giving Fentanyl or Ketamine Intranasally during Phacoemulsification Surgery: Intranasal Fentanyl VS Intranasal Ketamine in Phacoemulsification Cataract Surgery: Intranasal Fentanyl VS Intranasal Ketamine in Phacoemulsification Cataract Surgery”. Galen Medical Journal 12 (December 17, 2023): e2921. Accessed January 24, 2025. https://journals.salviapub.com/index.php/gmj/article/view/2921.