1. OECD 2017 http://www.oecd.org/els/health-systems/Obesity-Update-2017.pdf
2. National Institute for Health and Care Excellence (NICE) 2014 https://www.nice.org.uk/guidance/cg189/resources/obesity-identification-assessment-and-management-pdf-35109821097925
3. National Institute for Health and Care Excellence (NICE) 2014 https://www.nice.org.uk/guidance/ph53/resources/weight-management-lifestyle-services-for-overweight-or-obese-adults-1996416726469
4. Scottish Intercollegiate Guidelines Network (SIGN) 2010 http://www.sign.ac.uk/assets/sign115.pdf