Coagulation Testing in Acute Ischemic Stroke Patients Taking Non-Vitamin K Antagonist Oral Anticoagulants - Purrucker, JC; Haas, K; Rizos, T; Khan, S; Poli, S; Kraft, P; Kleinschnitz, C; Dziewas, R; Binder, A; Palm, F; Jander, S; Soda, H; et al. (Stroke, 2016)