{HEAD ~ The preconcentrator} may also include a resistor and {TAIL ~ a proportional integral differential controller} 
include
{ HEAD ~ The preconcentrator } may also include a resistor and { TAIL ~ a proportional integral differential controller }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL