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