Natural History Of Quantitative Fatty Infiltration And 3D Muscle Volume After Nonoperative Treatment Of Symptomatic Rotator Cuff Tears - Bettina Hochreiter; Christoph Germann; Georg C. Feuerriegel; Reto Sutter; Farah Selman; Maximilian Gressl; Eugene Ek; Karl Wieser (JSES International)