Flowchartof modeling process for calculating anemia burden. Illustration of the process used for first calculating the total amount of anemia present in each country, age, sex, and year (the anemia “envelope”), then apportioning it to individual causes of anemia in a hierarchical, mutually exclusive, and evidence-based approach. DHS, Demographic and Health Surveys; HgB, hemoglobin; IHME, Institute for Health Metrics and Evaluation; Lowess R.E., locally weighted scatterplot smoothing random effects regression; NOS, not otherwise specified; OLS, ordinary least squares; PfPR, Plasmodium falciparum parasite rate; VMNIS, Vitamin and Mineral Nutrition Information System.