1. Arkachaisri T: Pediatric Rheumatology in Asia: The Thai Experience. Pediatric Rheumatology Online Journal 2004, 2(3):286-294.
2. List of countries by population: http://en.wikipedia.org/wiki/List_of_countries_by_population 2010
3. Spencer CH: Why should pediatric rheumatology be recognized as a separate subspecialty: an open letter to medical councils and government agencies. Pediatric Rheumatology 2007, 5(21):1-3.
4. Singapore Department of Statistics: Census of Population 2010. Advance Census Release. Available at http://wwwsingstatgovsg/pubn/popn/c2010acrpdf . 2010.
5. WHO: The Burden of Musculoskeletal Conditions at the Start of the New Millennium: report of a WHO scientific group. Geneva, Switzerland; 2003.