{HEAD ~ Immunoassay} which can be performed within {TAIL ~ a short period} of time and a reagent composition for such immunoassay 
performed within
{ HEAD ~ Immunoassay } which can be performed within { TAIL ~ a short period } of time and a reagent composition for such immunoassay
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH