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