| AZA | azathioprine |
| BVAS | Birmingham vasculitis activity scale |
| F | female |
| GCs | glucocorticoids |
| GPA | granulomatosis with polyangiitis |
| KL6 | Krebs von den Lungen |
| M | male |
| MMF | mycophenolate mofetil |
| MPA | microscopic polyangiitis |
| MTX | methotrexate |
| PNS | peripheral nervous system |
| RTX | rituximab |
| VDI | vasculitis damage index |
| * | at T0 |