Angela D. Hamblin, Karen Cairns, and David M. Keeling. 2012. “The Use of Age-Dependent D-Dimer Cut-off Values to Exclude Deep Vein Thrombosis. Reply to ‘Using an Age-Dependent D-Dimer Cut-off Value Increases the Number of Older Patients in Whom Deep Vein Thrombosis Can Be Safely excluded’. Haematologica 2012;97(10):1507-13”. Haematologica 97 (11). Pavia, Italy, e43-e44. https://doi.org/10.3324/haematol.2012.072231.