Additional file 1: of Extramedullary versus intramedullary femoral alignment technique in total knee arthroplasty: a meta-analysis of randomized controlled trials TangQian ShangPing ZhengGang XuHua-Zi LiuHai-Xiao 2017 Comparison of blood loss between femoral EM and IM technique (P = 0.009). (DOCX 12 kb)