WHO Global Database on Body Mass Index. http://apps.who.int/bmi/index.jsp (accessed 24 December 2013)
Cole TJ, Bellizzi MC, Flegal KM, Dietz WH. Establishing a standard definition for child overweight and obesity world wide: international survey. BMJ 2000; 320: 1240-3.
Cole TJ, Flegal KM, Nicholls D, Jackson AA. Body-mass index cut offs to define thinness in children and adolescents: international survey. BMJ 2007; 335: 194-7.
De Onis M, Onyango AW, Borghi E et al. Development of a WHO growth regerence for school-aged children and adolescents. Bull World Health Organ 2007; 85: 660-7.
Fryar CD, Carroll MD, Ogden CL, Division of Health and Nutrition Examination Surveys. Prevalence of overweight, obesity, and extreme obesity among adults: United States, Trends 1960-1962 through 2009-2010. NCHS Health E-Stat. Hyattsville, MD: National Center for Health Statistics. 2012.