The kit contains such items as a transport tube, and {HEAD ~ collection swabs} for obtaining {TAIL ~ a cell sample} 
for obtaining
The kit contains such items as a transport tube , and { HEAD ~ collection swabs } for obtaining { TAIL ~ a cell sample }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL