Barcella, Luca, et al. “Long-Term Persistence of High Anti-PF4 Antibodies Titer in a Challenging Case of AZD1222 Vaccine-Induced Thrombotic Thrombocytopenia”. Bleeding, Thrombosis and Vascular Biology, vol. 2, no. 2, June 2023, doi:10.4081/btvb.2023.72.