In {HEAD ~ a preferred embodiment} the reducing agent is added to blood, which preferably contains {TAIL ~ an anti coagulating agent}, such as trisodium citrate or directly to plasma 
In { HEAD ~ a preferred embodiment } the reducing agent is added to blood , which preferably contains { TAIL ~ an anti coagulating agent } , such as trisodium citrate or directly to plasma
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH