Interobserver Reliability of the Kellgren-Lawrence Classification of Degenerative Knee Osteoarthritis among Resident Physicians from the University of the Philippines – Philippine General Hospital. Acta Med Philipp [Internet]. 2022 Mar. 30 [cited 2025 Apr. 4];56(5). Available from: https://actamedicaphilippina.upm.edu.ph/index.php/acta/article/view/1390