Pasquale Pignatelli, Evaristo Ettorre, Danilo Menichelli, Arianna Pani, Francesco Violi, Daniele Pastori. Seronegative antiphospholipid syndrome: refining the value of “non-criteria” antibodies for diagnosis and clinical management. Haematologica 2020;105(3):562-572; https://doi.org/10.3324/haematol.2019.221945.