title: Once and only once.
authors.forename: F R
authors.initials: FR
authors.lastname: Rosendaal
mesh_terms: D000925:Anticoagulants / Q000627:therapeutic use*; D019317:Evidence-Based Medicine; D006801:Humans; D012307:Risk Factors; D020246:Venous Thrombosis / Q000453:epidemiology* / Q000517:prevention & control*
chemical_list: D000925:Anticoagulants