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Distribution of the difference in days∗ between acute venous thromboembolism (VTE) symptom onset and the index hospital admission date among confirmed VTE cases. ∗A negative number indicates that VTE symptom onset occurred prior to the hospital admission date (day 0). VTE symptom onset is shown above for the 32 confirmed VTE cases for whom the date of onset could be determined; for 6 confirmed cases, the date of VTE symptom onset was indeterminate.
