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Upper part: Titration of anti‐A alloantibodies using crossmatching tests with consecutive dilutions of the cat's plasma and red blood cells (RBCs) from 2 type A cats. A positive crossmatch was noticed until dilution 1/32 in both cats. Lower part: Titration of anti‐B alloantibodies using crossmatching test with consecutive dilutions of the cat's plasma and RBCs from 2 type B cats. A positive crossmatch was noticed until dilution 1/4 in both cats.
