| DIPj | Distal interphalangeal joint |
| EE | Extensor enthesis |
| ET | Extensor tendon |
| FF | Flexor enthesis |
| FT | Flexor tendon |
| GS | Grey scale |
| MCPj | Metacarpophalangeal joint |
| MH | Metacarpal head |
| MP | Middle phalanx |
| PABAK | Prevalence adjusted and bias-adjusted kappa |
| PIPj | Proximal interphalangeal joint |
| PP | Proximal phalanx |
| US | Ultrasonography |
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