Pagnoux C, Carette S, Khalidi NA, Walsh M, Hiemstra TF, Cuthbertson D, Langford C, Hoffman G, Koening CL, Monach PA, Moreland L, Mouthon L, Seo P, Specks U, Ytterberg S, Westman K, Hoglund P, Harper L, Flossman O, Luqmani R, Savage CO, Rasmussen N, de Groot K, Tesar V, Jayne D, Merkel PA, Guillevin L. Comparability of patients with ANCA-associated vasculitis enrolled in clinical trials or in observational cohorts. Clin Exp Rheumatol. 2015 Mar-Apr; 33(2 Suppl 89):S-77-83.