Adetokunbo O. Lucas, Adjunct Professor of International Health, Harvard University, USA; Visiting Professor, London School of Hygiene and Tropical Medicine, University of London, UK; Formerly Professor, University of Ibadan, Nigeria Herbert M. Gilles, Emeritus Professor, University of Liverpool, UK; Visiting Professor of Public Health, University of Malta; Formerly Professor & Dean, LSTM, Liverpool, UK and Formerly Professor, University of Ibadan, Nigeria Dr Timothy O'Dempsey, Director of Humanitarian Studies and Senior Lecturer in Clinical Tropical Medicine, Liverpool School of Hygiene and Tropical Medicine, Liverpool, UK Dr Taofeek Ibrahim, Senior Lecturer, Department of Community Health, College of Health Sciences, Usmanu Danfodiyo University & Teaching Hospital, Sokoto, Nigeria