Fortina M, Carta S, Del Vecchio, et al. E. Retroperitoneal hematoma due to spontaneous lumbar artery rupture during fondaparinux treatment. Case report and review of the literature. Acta Biomed. 2007;78(1):46-50. Accessed April 24, 2026. https://mattioli1885journals.com/index.php/actabiomedica/article/view/1927