The invention can be used to construct tests using {HEAD ~ a number} of formats, labeling methods, category binding molecules, and {TAIL ~ detection methods} 
The invention can be used to construct tests using { HEAD ~ a number } of formats , labeling methods , category binding molecules , and { TAIL ~ detection methods }
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 TAIL TAIL TAIL TAIL TAIL TAIL