Elisabetta Castoldi, Lisbeth F.A. Maurissen, Daniela Tormene, Luca Spiezia, Sabrina Gavasso, Claudia Radu, Tilman M. Hackeng, Jan Rosing, Paolo Simioni. Similar hypercoagulable state and thrombosis risk in type I and type III protein S-deficient individuals from families with mixed type I/III protein S deficiency. Haematologica 2010;95(9):1563-1571; https://doi.org/10.3324/haematol.2010.021923.