- Correspondence to Dr Phaik Yeong Cheah, Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, 420/6 Rajvithi Road, Bangkok 10400, Thailand;
- Received July 29, 2014
- Revised October 25, 2014
- Accepted November 2, 2014
- First published December 4, 2014.
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