First sample was collected on a tub

First sample was collected on a tube contained 0.11 M sodium citrate anticoagulant (1:9, v:v), and used for plasma preparation for screening of the following blood coagulation tests: prothrombin time (PT), activated partial thromboplastin time (APTT), and fibrinogen (FIB) concentrations, by using Dade® Behring reagents and following manufacturer's instructions as previously described