| 1. A composition comprising a first purified antibody, or antigen-binding fragment thereof, and at least a second therapeutic
agent; wherein said first antibody or antigen-binding fragment thereof comprises at least two variable regions that each comprises
three CDRs, wherein said two variable regions are:
(a) a heavy chain variable region that comprises variable heavy (VH) CDR1, VH CDR2 and VH CDR3 from the monoclonal antibody
3G4, produced by hybridoma ATCC PTA 4545, wherein said VH CDR1 has the amino acid sequence of SEQ ID NO:10, said VH CDR2 has
the amino acid sequence of SEQ ID NO:11 and said VH CDR3 has the amino acid sequence of SEQ ID NO:12; and
(b) a light chain variable region that comprises a variable light (VL) CDR1, VL CDR2 and VL CDR3 from the monoclonal antibody
3G4, produced by hybridoma ATCC PTA 4545, wherein said VL CDR1 has the amino acid sequence of SEQ ID NO:13, said VL CDR2 has
the amino acid sequence of SEQ ID NO:14 and said VL CDR3 has the amino acid sequence of SEQ ID NO:15.
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