Fig. 1.

Mean improvements in clinical and MRI scores at PP, EP I, and EP II. a Lysholm knee score, b our original knee-function score, c MOCART score. **p < 0.01 ***p < 0.001 (vs. PP)

Mean improvements in clinical and MRI scores at PP, EP I, and EP II. a Lysholm knee score, b our original knee-function score, c MOCART score. **p < 0.01 ***p < 0.001 (vs. PP)