Superior and Secondary Cleft Signs in Athletic Groin Pain: Correlation of Dedicated MRI and Symphysography Findings as Well as Anterior Pelvic Ring Instability - Weber, M. A.; Gerhardt, J. S.; Tischer, T.; Holl, N.; Lenz, R.; Krüger, J. (Seminars in Musculoskeletal Radiology, 2020)