1 Department of Clinical Pharmacology and Therapeutics, Federal University Dutse, Dutse, Jigawa State, Nigeria, Mohammed.a@fud.edu.ng, doctormohagcon@gmail.com.
2 Department of Anaesthesiaßederal Medical Centre, akurdi, Benue State, Nigeria.
3 Department of Anaesthesia, Aminu Kano Teaching Hospital, Kano, Nigeria.
4 Department of Anaesthesia, Irrua Specialist Teaching Hospital, Irrua, Edo State, Nigeria.