Marc Righini, Christelle Jobic, Françoise Boehlen, Jean Broussaud, François Becker, Morgan Jaffrelot, Marc Blondon, Bruno Guias, Grégoire Le Gal, the EDVIGE study group. Predicting deep venous thrombosis in pregnancy: external validation of the LEFT clinical prediction rule. Haematologica 2013;98(4):545-548; https://doi.org/10.3324/haematol.2012.072009.