1. Colquitt JL, Pickett K, Loveman E, et al. Surgery for weight loss in adults. Cochrane Database Syst Rev. 2014;8:CD003641.
2. Buchwald H, Varco R. Metabolic surgery. New York: Grune & Stratton; 1978.
3. Buchwald H. The evolution of metabolic/bariatric surgery. Obes Surg. 2014;24:1126–35.
4. World Health Organization. Obesity and overweight key facts. Accessed July 2018.
http://www.who.int/news-room/fact-sheets/detail/obesity-and-overweight
. Accessed 20 June 2018
5. Dobbs R, Sawers C, Thompson F, et al. Overcoming obesity: an initial economic analysis: McKinsey Global Institute; 2014.
https://www.mckinsey.com/mgi/our-research/discussion-papers-and-briefings
. Accessed 20 June 2018