1. School of Medicine, College of Health Science and Medicine, Wolaita Sodo University, Wolaita Sodo, Ethiopia
2. School of Anaesthesia, College of Health Science and Medicine, Wolaita Sodo University, Wolaita Sodo, Ethiopia
3. Yekatit 12 College of Health Science and Medicine, Addis Ababa, Ethiopia
4. Department of Anaesthesia, College of Health Science, Arsi University, Asella, Ethiopia