| http://www.w3.org/ns/prov#value | - Did individual have risk factors such as prolonged bed rest or inactivity, surgery or catheterization within the last 3 months, femur or pelvic trauma, fracture, immobilization of a lower extremity, cancer, chronic heart disease, childbirth, stroke, CHF, COPD, autoimmune disease, oral contraceptive use, frequent air travel, or obesity?
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