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