Petimar J, Moran AJ, Ramirez M, Block JP. A Natural Experiment to Evaluate the Nutritional Content of Restaurant Meal Purchases After Calorie Labeling. J Acad Nutr Diet. 2020 Dec;120(12):2039-2046. doi: 10.1016/j.jand.2020.06.006. Epub 2020 Aug 29. PMID: 32868189; PMCID: PMC7686154.