Method and apparatus for separating serum or {TAIL ~ plasma} from {HEAD ~ the formed elements} of the blood 
Method and apparatus for separating serum or { TAIL ~ plasma } from { HEAD ~ the formed elements } of the blood
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH