However, the lack of baseline thrombosis history assessment limits our ability to discern causality, and the association with baseline erythrocytosis is confounded by insufficient investigation into its causes—such as EPO levels or JAK2 mutation status—as only 1.6% of erythrocytosis patients received hematology consultations, potentially missing underlying conditions like PV. This evidence concerns the gene JAK2 and Venous thrombosis.