Farzam, H., Yari, M., Mohammadi, G. and Rahmatinejad, M. (2020) “A comparative study of tramadol and lidocaine gel on complications of orotracheal intubation”, Anaesthesia, Pain & Intensive Care, 24(2), pp. 183-188. doi: 10.35975/apic.v24i2.1260.