Comparison Effect of Intravenous Ketamine with Pethidine for Analgesia and Sedation during Bone Marrow Procedures in Oncologic Children: A Randomized, Double-Blinded, Crossover Trial - Abdolkarimi, Babak; Zareifar, Soheila; Golestani Eraghi, Majid; Saleh, Fazl (International Journal of Hematology-Oncology and Stem Cell Research, 2016)