Furthermore, the proportion of {HEAD ~ T cells} to {TAIL ~ B cells} is approximately the same as that of the original blood 
to
Furthermore , the proportion of { HEAD ~ T cells } to { TAIL ~ B cells } is approximately the same as that of the original blood
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH