1. WHO. Factsheet overweight and obesity. 2016. Retrieved from http://www.who.int/mediacentre/factsheets/fs311/en/
2. Hruby A, Manson JAE, Qi L, Malik VS, Rimm EB, Sun Q, et al. Determinants and consequences of obesity. American Journal of Public Health. 2016;106:1656–62.
3. Jansen A, Havermans R, Nederkoorn C, Roefs A. Jolly fat or sad fat? Subtyping non-eating disordered overweight and obesity along an affect dimension. Appetite. 2008;51(3):635–40.
4. Young LR, Nestle M. The contribution of expanding portion sizes to the US obesity epidemic. Am J Public Health. 2002;92(2):246–9.
5. • Hollands GJ, Shemilt I, Marteau TM, Jebb SA, Lewis HB, Wei Y, et al. Portion, package or tableware size for changing selection and consumption of food, alcohol and tobacco. Cochrane Database Syst Rev. 2015;9(9), CD011045. A Cochrane review about, among other factors, the portion-size effect on energy intake. Estimation that the energy intake from food and non-alcoholic beverages attributable to differences in product sizes was between 215–279 kcal/day.