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