1. Discipline of Medical Radiation Sciences, Faculty of Health Sciences, University of Sydney, Cumberland Campus, 75 East Street, Lidcombe NSW 2141, Australia
2. Department of Radiology, Nnamdi Azikiwe University Teaching Hospital, PMB 5025 Nnewi, Anambra State, Nigeria
3. Department of Radiography and Radiological Sciences, Faculty of Allied Medical Sciences, University of Calabar, PMB 1115 Calabar, Nigeria