The sense resistors ensure that there is {HEAD ~ current sharing} through each of {TAIL ~ the current control stages} 
The sense resistors ensure that there is { HEAD ~ current sharing } through each of { TAIL ~ the current control stages }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL