After washing {HEAD ~ the precipitation} is dissolved in {TAIL ~ a cooled physiological salt solution} and is immediately frozen 
is dissolved in
After washing { HEAD ~ the precipitation } is dissolved in { TAIL ~ a cooled physiological salt solution } and is immediately frozen
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH