Fieseler, G., Laudner, K., Sendler, J., Cornelius, J., Schulze, S., Lehmann, W., Hermassi, S., Delank, K. S., Schwesig, R. The internal rotation and shift-test for the detection of superior lesions of the rotator cuff: reliability and clinical performance. JSES International 2022; 3: 495-499