title: What Is the Main Reason for Reduction in Duration of Action of Local Anesthetics Used for Spinal Anesthesia in Opium Addicted Patients?
authors.affiliation: Assistant Professor, Department of Pediatrics, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Samaneh
authors.initials: S
authors.lastname: Kouzehgaran
authors.affiliation: Assistant Professor, Department of Anesthesiology, School of Medicine, Birjand University of Medical Sciences, Birjand, Iran.
authors.forename: Amir
authors.initials: A
authors.lastname: Saber-Tanha