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Inclusion criteria of ONFH
| ARCO stage | Modified Kerboul anglesa | Painb |
| Stage I | ≥ 190° | ≥ 20 mmc |
| Stage II | < 190° | ≥ 20 mmc |
| Stage II | ≥ 190° | ≥ 20 mm or no painc |
Sum of coronal and sagittal necrotic angles.
WOMAC VA3.1 pain during the 48 hours before screening.
On a 100-mm scale. ONFH = osteonecrosis of the femoral head; ARCO = Association Research Circulation Osseous.
