please give me article reference for this sentence: obesity currently affect more than a third of the global population

Here are a few article references that discuss the global prevalence of obesity:

1. NCD Risk Factor Collaboration (NCD-RisC). (2017). Worldwide trends in body-mass index, underweight, overweight, and obesity from 1975 to 2016: a pooled analysis of 2416 population-based measurement studies in 128·9 million children, adolescents, and adults. The Lancet, 390(10113), 2627-2642.

2. Afshin, A., Forouzanfar, M. H., Reitsma, M. B., Sur, P., Estep, K., Lee, A., ... & Murray, C. J. (2017). Health effects of overweight and obesity in 195 countries over 25 years. New England Journal of Medicine, 377(1), 13-27.

3. World Health Organization. (2020). Obesity and overweight. Retrieved from https://www.who.int/news-room/fact-sheets/detail/obesity-and-overweight

Please note that while these articles provide information on the global prevalence of obesity, none of them specifically state that "obesity currently affects more than a third of the global population". The exact prevalence may vary depending on the source and the year of the data.