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Serum concentrations of different types of AMAs in patients with pPBC or nPBC during 5-year follow-up (mean±SE)
| pPBC | nPBC | P | |
| Anti-M2 (RU/mL) | 199 ± 48 | 265 ± 81 | 6×10–12 |
| Anti-M4 (RU/mL) | 474 ± 149 | 103 ± 17 | 0.09 |
| Anti-M9 (RU/mL) | 49 ± 15 | 120 ± 28 | 0.03 |
