Tekkeşin, Nilgün Discard first tube for coagulation testing. [electronic resource] - Blood coagulation & fibrinolysis : an international journal in haemostasis and thrombosis Jun 2012 - 299-303 p. digital Publication Type: Journal Article ISSN: 1473-5733 Standard No.: 10.1097/MBC.0b013e328351ebbf doi Subjects--Topical Terms: AdultCohort StudiesHumansInternational Normalized Ratio--methodsPartial Thromboplastin Time--methodsProthrombin Time--methodsSpecimen Handling--methods