Added value of antiphosphatidylserine/prothrombin antibodies in the workup of thrombotic antiphospholipid syndrome: communication from the ISTH SSC Subcommittee on Lupus Anticoagulant/Antiphospholipid Antibodies - Vandevelde, A; Chayoua, W; de Laat, B (J Thromb Haemost, 2022)