a humanized antibody , or a scfv , fab , or f 2 thereof , includes : a heavy chain variable region , or a homologous variant thereof , wherein the heavy chain variable region includes : heavy chain framework regions , cdrh1 that has the sequence of seq id no : 19 , cdrh2 that has the sequence of seq id no : 20 , and cdrh3 that has the sequence of seq id no : 21 , wherein the heavy chain variable region and the homologous variant share at least 90 % sequence identity in the heavy chain framework regions ; and a light chain variable region , or a homologous variant thereof , that includes : light chain framework regions , cdrl1 that has the sequence of seq id no : 22 , cdrl2 that has the sequences of seq id no : 23 , and cdrl3 that has the sequences of seq id no : 24 , wherein the light chain variable region and the homologous variant share at least 90 % sequence identity in the light chain framework regions .