Roberts LN, Patel RK, Donaldson N, Bonner L, Arya R. Post-thrombotic syndrome is an independent determinant of health-related quality of life following both first proximal and distal deep vein thrombosis. Haematologica 2014; 99(3):e41-e43; https://doi.org/10.3324/haematol.2013.089870.