Any way to remove duplicate term IEEE from bibliography?

Sample Code

begin{document}
% ....
% References
{small
bibliographystyle{ieeetr}
cleardoublepage
phantomsection
addcontentsline{toc}{chapter}{BIBLIOGRAPHY}
bibliography{Thesis_Main}
}
end{document}

Bib file

@inproceedings{ref20,
  title={Passive RFID for intelligent transportation systems},
  author={Ali, Kashif and Hassanein, Hossam},
  booktitle={2009 6th IEEE Consumer Communications and Networking Conference},
  pages={1--2},
  year={2009},
  organization={IEEE}
}

@inproceedings{ref21,
  title={A security and privacy enhanced protection scheme for secure 900MHz UHF RFID reader on mobile phone},
  author={Park, Namje and Lee, Haedong and Kim, Howon and Won, Dongho},
  booktitle={2006 IEEE International Symposium on Consumer Electronics},
  pages={1--5},
  year={2007},
  organization={IEEE}
}

Output

But my supervisor asked me to remove term ‘IEEE’ from yellow marked places of items for whose the term appears anywhere in the text before that yellow mark (example shown as red underlines). Any way to remove duplicate term IEEE from bibliography?