Mortada, Mohamed Reliability of a Proposed Ultrasonographic Grading Scale for Severity of Primary Knee Osteoarthritis. [electronic resource] - Clinical medicine insights. Arthritis and musculoskeletal disorders 2016 - 161-6 p. digital Publication Type: Journal Article ISSN: 1179-5441 Standard No.: 10.4137/CMAMD.S38141 doi