“PO04 | Classification criteria for antiphospholipid syndrome: ACR/EULAR 2023 versus Sydney 2006 – A monocentric and retrospective study: S. Suardi*, A. Marino*, J. Croce, F. Maiolini, E. Tinazzi, S. Moruzzi, L. Delfino, F. Pizzolo, E. Bassanello, G. Marcassa, C. Spillere, S. Friso, N. Martinelli | *the two authors equally contributed to the work and share the first authorship; Department of Medicine, Section of Internal Medicine, University of Verona, Italy” (2025) Bleeding, Thrombosis and Vascular Biology, 4(s1). doi:10.4081/btvb.2025.266.