Low-dose aspirin vs. low molecular weight heparin for thromboprophylaxis after fractures Niedrig-dosierte orale Acetylsalicylsäure vs. niedermolekularem subkutanem Heparin zur Thromboembolieprophylaxe nach Frakturen : Critical appraisal of the multicenter PREVENT CLOT trial conducted by the Major Extremity Trauma Research Consortium (METRC) Kritische Analyse des multizentrischen PREVENT CLOT Trial des Major Extremity Trauma Research Consortium (METRC) : Critical appraisal of the multicenter PREVENT CLOT trial conducted by the Major Extremity Trauma Research Consortium (METRC)