Eaton, Julie, Ian Painter, and William Lober. “Accrued – An R Package for Visualizing Data Quality for Aggregate Surveillance Data”. Online Journal of Public Health Informatics 6, no. 1 (March 3, 2014). Accessed January 27, 2022. https://ojphi.org/ojs/index.php/ojphi/article/view/5018.