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Costochondral calcification and valvular bone.
| Degree of costochondral calcification | Bone present % (#) | Bone absent % (#) |
|---|---|---|
| None | 9 (43) | 46 (44) |
| Minimal | 5 (24) | 16 (15) |
| Mild | 5 (24) | 15 (14) |
| Moderate | 1 (5) | 10 (10) |
| Severe | 1 (5) | 18 (17) |
| Total | 21 (100) | 105 (100) |
