1. http://www.who.int/nmh/publications/ncd_report_chapter1.pdf
2. http://www.who.int/mediacentre/factsheets/fs317/en/
3. http://www.who.int/mediacentre/factsheets/fs311/en/
4. http://www.mckinsey.com/industries/healthcare-systems-and-services/our-insights/how-the-world-could-better-fight-obesity
5. http://apps.who.int/iris/bitstream/10665/204871/1/9789241565257_eng.pdf