A method 1 wherein said {TAIL ~ leukocyte containing suspension} is caused to flow, by means of instillation, through the container having packed therein said mass of fibers having a bulk density of from 0.04 to 0.15 gram/cubic centimeter and an average fiber diameter of from 5 to 10 microns, whereby a substantial part of {HEAD ~ the leukocytes} is entrapped in said mass of fibers and a leukocyte poor liquid is obtained 
A method 1 wherein said { TAIL ~ leukocyte containing suspension } is caused to flow , by means of instillation , through the container having packed therein said mass of fibers having a bulk density of from 0.04 to 0.15 gram / cubic centimeter and an average fiber diameter of from 5 to 10 microns , whereby a substantial part of { HEAD ~ the leukocytes } is entrapped in said mass of fibers and a leukocyte poor liquid is obtained
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH