Allore HG, Ning Y, Brandt CA, Goulet JL. Accounting for the Hierarchical Structure in Veterans Health Administration Data: Differences in Healthcare Utilization between Men and Women Veterans. ijsmr [Internet]. 2013 Apr. 30 [cited 2025 Apr. 3];2(2):94-103. Available from: http://lifescienceglobalca.com/index.php/ijsmr/article/view/1106