Proton Pump Inhibitors May Increase the Risk of Delayed Bleeding Complications after Open Heart Surgery if Used Concomitantly with Warfarin - Hata, M.; Hayasaka, M.; Sezai, A.; Niino, T.; Yoda, M.; Unosawa, S.; Taoka, M.; Osaka, S.; Furukawa, N.; Kimura, H.; Minami, K. (The Thoracic and Cardiovascular Surgeon, 2008)