Randomized trial of cyclophosphamide versus methotrexate for induction of remission in "non-renal" AbCA-associated vasculitis. - de Groot, K; Rasmussen, N; Bacon, P; Tervaert, J; Feighery, C; Gregorini, G; Gross, W; Luqmani, R; Jayne, DR; Grp, E (2003)