− Alternatively, if the clotting and centrifugation of the Sample is performed prior to reception at the Laboratory  (for example, at the site of Sample  collection) , Samples may be received at the Laboratory  as frozen/r efrigerated blood Samples  either in the same Sample collection tubes  or as separated serum in new tubes;  − The Laboratory  shall check the status of the Sample(s)  (e.g., evidence of hemolysis) and the integrity of the collection tubes ( e.g., evidence of breakage of the separating gel).