Evaluation of the i-STAT point-of-care capillary whole blood prothrombin time and international normalized ratio: comparison to the Tcoag MDAII coagulation analyzer in the central laboratory - Peña, J A; Lewandrowski, K B; Lewandrowski, E L; Gregory, K; Baron, J M; Van Cott, E M (Clin Chim Acta, 2012)