Elenius Madsen D, Ingerslev J, Sidelmann JJ, Thorn JJ, Gram JB. Intraoperative blood loss during orthognathic surgery is predicted by thrombelastography. Journal of Oral and Maxillofacial Surgery. 2012;70(10):e547-52. doi: 10.1016/j.joms.2012.06.182