Acute venous thromboembolism after non-major orthopaedic surgery or post-traumatic limb immobilisation - Bertoletti, Laurent; Righini, Marc; Bounameaux, Henri; López-Jiménez, Luciano; Tiraferri, Eros; Visonà, Adriana; Monreal, Manuel; and the RIETE Investigators (Thrombosis and Haemostasis, 2011)