Cold Agglutinin Titer Cold Agglutinin Titer Cold Agglutinin Titer Cold Agglutinin Titer Cold Agglutinin Titer Cold Agglutinin Titer Cold Agglutinin Titer Cold Agglutinin Titer Cold Agglutinin Titer Cold Agglutinin Titer Mycoplasma serology Mycoplasma serology Cold Agglutinin Titer Cold Agglutinin Titer Cold Agglutinin Titer Cold Agglutinin Titer Cold Agglutinin Titer