Factor XII gene (F12) −4C/C polymorphism in combination with low protein S activity is associated with deep vein thrombosis - Kanaji, Taisuke; Watanabe, Kumiko; Hattori, Sachiko; Urata, Michiyo; Iida, Hiroko; Kinoshita, Sachiko; Kayamori, Yuzo; Kang, Dongchon; Hamasaki, Naotaka (Thrombosis and Haemostasis, 2006)