“Differential Item Functioning Analysis Using the SF-36 in Patients With Lumbar Disc Herniation: A Quality of Life Research”. Epidemiology, Biostatistics, and Public Health 15, no. 3 (February 17, 2022). Accessed July 27, 2026. https://test-ojs-unimi-it.archicoop.it/index.php/ebph/article/view/17364.