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Selection of study population and reasons for exclusion. Abbreviations: VTE = venous thromboembolism * On basis of hospital enrolment forms † On basis of patient enrolment logs, includes patients who did not meet protocol requirements (eg., age, type of condition, or missing hospital chart) ‡ Includes patients in general surgical units, surgical intensive care units, neurosurgery, gynecology and orthopedics § Includes patients in other eligible wards.
