- Correspondence to Dr Kittisak Sawanyawisuth, Department of Medicine, Faculty of Medicine, 123 Mitraparp Road, Khon Kaen 40002, Thailand;
- Accepted December 31, 2011
- First published January 27, 2012.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.