Acknowledgement
The support given by Physicians, medical officers, research assistants of SACTRC and nurses of the 3 hospitals is acknowledged. The South Asian Clinical Toxicology Research Collaboration is funded by the Wellcome Trust/National Health and Medical Research Council International Collaborative Research Grant 071669MA. IG is funded by the Australian Leadership award-2008. We also wish to thank Syngenta for performing plasma paraquat assays.