| Abbreviations | Meaning |
 | RAS | Rheumatoid Arthritis Serum |
| JCP | Juvenile Chronic Polyarthritis |
| B | Bone Marrow-derived [cell Or Lymphocyte] |
| OARS | Osteoarthritis Research Society |
| HOA | Hip Osteoarthritis; Hypertrophic Osteoarthropathy |
| FNBMD | Femoral Neck Bone Mineral Density |
| GO | Geroderma Osteodysplastica |
| ORSA | Osteoclast Resorption Stimulating Activity; Oxacillin-resistant Staphylococcus Aureus |
| AC/BC | Air Conduction/bone Conduction [time Ratio] |
| OS | Osteogenic Sarcoma |
| BASE | B27-arthritis-sacroiliitis-extra-articular Features [syndrome] |
| OSF | Open Software Foundation; Organ System Failure; Osteoclast-stimulating Factor; Outer Spiral Fiber; Overgrowth Stimulating Factor |
| HOA | Hypertrophic Osteoarthropathy |
| AHO | Acute Hematogenous Osteomyelitis; Albright Hereditary Osteodystrophy |
| RO | Renal Osteodystrophy |
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