Dabigatran etexilate and concomitant use of non-steroidal anti-inflammatory drugs or acetylsalicylic acid in patients undergoing total hip and total knee arthroplasty: no increased risk of bleeding - Friedman, R J; Kurth, A; Clemens, A; Noack, H; Eriksson, B I; Caprini, J A (Thromb Haemost, 2012)