1. 1University of the West Indies. Anaesthesia & Intensive Care Unit. St Augustine, Trinidad. 2San Fernando General Hospital. Anaesthesia & Intensive Care Unit. San Fernando. Trinidad.
2. 1University of the West Indies. Anaesthesia & Intensive Care Unit. St Augustine, Trinidad. 3Eric Williams Medical Sciences Complex. Anaesthesia & Intensive Care Unit. Mt. Hope. Trinidad.
3. San Fernando General Hospital. Anaesthesia & Intensive Care Unit. San Fernando. Trinidad.