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