1 Discipline of Anaesthesiology, Royal Brisbane and Women's Hospital, Department of Anaesthesia & Perioperative Medicine and The University of Queensland, Brisbane, QLD, Australia. Electronic address: a.vanzundert@uq.edu.au.
2 Department of Anaesthesiology, Dr. Panjabrao Deshmukh Memorial Medical College, Amravati, Maharashtra, India.
3 Department of Community Medicine, KMC Medical College and Hospital, Maharajganj, UP, India.