We were surprised to read the letter by Berti and colleagues1, commenting on our recent article on the incidence of arterial and venous thrombosis in antineutrophil cytoplasmic antibody-associated vasculitis (AAV)2 They make the unjustified comment that "the incidence estimates for [arterial (ATE) and venous thrombosis events (VTE)] may be inflated" when we give clear and accurate incidence rates.