1. United Nations University International Institute for Global Health, UNU-IIGH Building, UKM Medical Centre, Jalan Yaacob Latiff, Bandar Tun Razak, Cheras, 56000 Kuala Lumpur, Malaysia
2. Department of Community Health, University Kebangsaan Malaysia, UKM Medical Centre, Jalan Yaacob Latiff, Bandar Tun Razak, Cheras, 56000 Kuala Lumpur, Malaysia
3. International Case-Mix and Clinical Coding Centre, Faculty of Medicine, UKM Medical Centre, Jalan Yaacob Latiff, Bandar Tun Razak, Cheras, 56000 Kuala Lumpur, Malaysia
4. Centre for Development Research, University of Natural Resources and Life Sciences, Vienna, Borkowskigasse 4, 1190 Vienna, Austria
5. Institute for Sanitary Engineering and Water Pollution Control, University of Natural Resources and Life Sciences, Vienna, Nussdorfer Lände 11, 1190 Vienna, Austria
6. Institute of Hydraulics and Rural Water Management, University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190 Vienna, Austria