Anti-PF4 VITT antibodies are oligoclonal and variably inhibited by heparin. - Singh B; Kanack A; Bayas A; George G; Abou-Ismail MY; Kohlhagen M; Christ M; Naumann M; Moser K; Smock K; Grazioli A; Murray D; et al. (MedRxiv : the preprint server for health sciences, 2021)