Displaying “Supplementary References” instead of a line as a title of a REVTeX bibliography

REVTeX (4 and 4-1) separates the bibliography from the rest of the paper with a horizontal line. I am wondering how I can replace that line with "Supplementary References" in the section heading font/format. Here my MWE:

\documentclass[onecolumn,noshowpacs,noshowkeys,pra]{revtex4-1}
\begin{document}

\section{Blah}
Blah blah blah
\section{More blah}
Blah blah blah blah

\begin{thebibliography}{99}
\bibitem{sample1} This is a sample bibitem
\bibitem{sample2} This is another sample bibitem
\end{thebibliography}
\end{document}


It produces this:

I want to replace the horizontal line with "SUPPLEMENTARY REFERENCES" (so that it looks like section titles ("I. BLAH" and "II. MORE BLAH").

UPDATE

After playing around a bit with this, I found that putting a \section* command inside thebibliography environment is allowed! Thus, this code:

\documentclass[onecolumn,noshowpacs,noshowkeys,pra]{revtex4-1}
\begin{document}

\section{Blah}
Blah blah blah
\section{More blah}
Blah blah blah blah

\begin{thebibliography}{99}
\section*{SUPPLEMENTARY REFERENCES}
\bibitem{sample1} This is a sample bibitem
\bibitem{sample2} This is another sample bibitem
\end{thebibliography}
\end{document}


produces this:

This sort of works for now. However, I would really like to be able to remove the line. Also, it would be nice to (painlessly) automate the process. I use BibTeX to create the *.bbl file automatically. While I suppose that I could write code (say, in python) that would run after every time I compile the bibliography with BibTeX and insert the line containing \section* command into the .bbl file, there must be a less kludgy way out there... right?

• The line is just how revtex formats the bibliography. They will put it back there. – Johannes_B Aug 23 '15 at 16:20

\def\bibsection{}