Randomized trial assessing the efficacy of the partial interruption of the inferior vena cava by an optional vena caval filter in the prevention of the recurrence of pulmonary embolism. PREPIC 2 trial: prevention of embolic recurrences by caval interruption (prospective, multi-centric, randomised, open trial). - Mismetti, P (Rev Pneumol Clin, 2008)