??Plasma - Collect plasma using EDTA or heparin as an anticoagulant. Centrifuge samples for 15 minutes at 1000×g within 30 minutes of collection. Remove plasma and assay immediately or store samples in aliquot at -20oC or -80oC. Avoid repeated freeze/thaw cycles.

??血漿：用EDTA或肝素作為抗凝劑采集標本，并將標本在采集后的30分鐘內于2-8oC 1000×g離心15分鐘，取上清即可檢測，或將上清置于-20oC或-80oC保存，但應避免反復凍融。