Amini, A. et al. 2018. Low-Dose Fentanyl, Propofol, Midazolam, Ketamine and Lidocaine Combination vs. Regular Dose Propofol and Fentanyl Combination for Deep Sedation Induction; a Randomized Clinical Trial. Archives of Academic Emergency Medicine. 6, 1 (Oct. 2018), e57. DOI:https://doi.org/10.22037/aaem.v6i1.101.