1. Department of Community Medicine, Faculty of Medicine and Allied Sciences, Rajarata University of Sri Lanka , Saliyapura , Sri Lanka
2. Centre for Health Services Studies and Kent and Medway Medical School, University of Kent , Canterbury , UK
3. Department of Parasitology, Faculty of Medicine and Allied Sciences, Rajarata University of Sri Lanka , Saliyapura , Sri Lanka
4. Department of Sociology, Faculty of Arts, University of Colombo , Colombo , Sri Lanka
5. International Vaccine Institute , Seoul , South Korea