Song, Pei-ze, Nan Wu, Cong Huo, and Xiao-ming Wang. “Correlation Analysis and Clinical Significance of Musculoskeletal Ultrasound Semi-Quantitative Grading With Bone Salt Metabolism, Rheumatoid Factor and Erythrocyte Sedimentation Rate in Patients With Rheumatoid Arthritis”. Pakistan Journal of Medical Sciences 39, no. 6 (September 22, 2023). Accessed April 30, 2025. https://pjms.org.pk/index.php/pjms/article/view/7144.