Massive portal vein thrombosis due to platelet-activating PF4 antibodies without proximate heparin exposure, infection, or SARS-CoV-2 vaccination - Langer, F; Voigtländer, M; Lindhauer, C; Bokemeyer, C; Kuta, P; Boenisch, O; Kluge, S; Wesche, J; Schönborn, L; Greinacher, A; Thiele, T (Hämostaseologie, 2025)