Mansour, H E Serum Calprotectin in Rheumatoid Arthritis: A Promising Diagnostic Marker, How Far Is It Related to Activity and Sonographic Findings? [electronic resource] - Journal of medical ultrasound - 40-46 p. digital Publication Type: Journal Article ISSN: 0929-6441 Standard No.: 10.1016/j.jmu.2016.11.001 doi