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Jalili M, Bahreini M, Doosti-Irani A, Masoomi R, Arbab M, Mirfazaelian H (March 2016). "Ketamine-propofol combination (ketofol) vs propofol for procedural sedation and analgesia: systematic review and meta-analysis". The American Journal of Emergency Medicine. 34 (3): 558–69. doi:10.1016/j.ajem.2015.12.074. PMID26809929.