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