Ronsdorf, A, and RA Schoenenberger. “Search for Occult Malignancy in Patients With Deep Venous Thrombosis: Results of a Retrospective Cohort Study”. Swiss Medical Weekly 133, no. 4142 (October 18, 2003): 567–574. Accessed April 19, 2024. https://smw.ch/index.php/smw/article/view/316.