1. Department of Medical Microbiology & Immunology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Cheras, Kuala Lumpur 56000, Malaysia
2. School of Health & Life Sciences, Room M9.12 (Middlesbrough Tower), Southfield Rd., Middlesbrough TS1 3BX, UK
3. National Horizons Centre, Teesside University, Darlington DL1 1HG, UK