providing a retainer with {HEAD ~ a plurality} of {TAIL ~ compartments}, wherein a first compartment comprises a first antibody and a second compartment comprises a second antibody 
of
providing a retainer with { HEAD ~ a plurality } of { TAIL ~ compartments } , wherein a first compartment comprises a first antibody and a second compartment comprises a second antibody
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH