Study	Reason for exclusion
Basu 2017	Not induction or maintenance therapy, treating fatigue
CHUSPAN 2 2017	Mixed population: EGPA, MPA or PAN
De Vita 2012	Wrong population: patients with cryoglobulinaemic vasculitis
Harper 2018	Not induction or maintenance therapy, treating fatigue
Imai 2006	Wrong patient population, mostly IgA; there were 5 patients with likely ANCA vasculitis in one group
Ribi 2010	Excluded patients with kidney disease (raised Cr and proteinuria) and they were only randomised after a period of steroid treatment. It is a study of treatment failure and relapse treatment rather than induction or maintenance therapy
Rifle 1990	Wrong diagnosis for most patients. Immunoglobulin deposits demonstrated in renal biopsies

ANCA ‐ anti‐neutrophil cytoplasmic antibody; RCT ‐ randomised controlled trial