A Case of Gastrointestinal Hemorrage Due to Warfarin Interaction with Nalidixic Acid Resulting in Massive Blood Loss oleh D. A. Sychev, O. A. Nizovtseva, G. S. Anikin, E. F. Burian, I. V. Butyakova, I. V. Ignatiev, S. YU. Serebrova, D. A. Guzhev, V. A. Dmitriev, V. G. Kukes