I have an issue when using multiple times entries of type "misc" in the bibliography in my document. Here is the MWE:

```
\documentclass[aps,jmp,amsmath,amssymb,reprint]{revtex4-1}
\begin{document}
Bla bla bla \cite{lammps} \cite{lammps_manual_fix_langevin}
\bibliography{biblio.bib}
\end{document}

```

Bibliography:

```
    @misc{lammps,
    title = {{LAMMPS website}},
    howpublished = {\url{http://lammps.sandia.gov}},
    note = {[Accessed: 10-October-2017]}
  }

    @misc{lammps_manual_fix_langevin,
      title = {{LAMMPS manual - fix langevin command}},
      howpublished = {\url{http://lammps.sandia.gov/doc/fix_langevin.html}},
      note = {[Accessed: 09-November-2017]}
    }

```

Result:

[![enter image description here](https://i.stack.imgur.com/ncBdR.png)](https://i.stack.imgur.com/ncBdR.png)

As you can see, there is an unwanted `()` appearing after the url. 

If I take out one of the two citation, it disappears:

[![enter image description here](https://i.stack.imgur.com/f3g1N.png)](https://i.stack.imgur.com/f3g1N.png)

What could be the source of this problem?