Jared Olsen J, Skov J, Ingerslev J, Thorn JJ, Pinholt EM. Prevention of bleeding in orthognathic surgery: a systematic review and meta-analysis of randomized controlled trials. Journal of Oral and Maxillofacial Surgery. 2016 jan. 1;74(1):139-150. doi: 10.1016/j.joms.2015.05.031