Agrawal V, Vaidya CK, Ye J, Freeman J, McKiernan C, Blier PR, Andrzejewski C, Germain M, Braden GL. Concomitant thrombotic thrombocytopenic purpura and ANCA-associated vasculitis in an adolescent. Pediatr Nephrol. 2011 Aug; 26(8):1317-20.