\documentclass[a4paper, oneside, 10pt]{article}
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\usepackage[english]{babel}
\date{\today}
\title{}
\author{}
\usepackage[utf8x]{inputenc}
\begin{document}



\section{\texorpdfstring{Lab Gallery}{Lab Gallery}}
\label{sec:lab_gallery}

\begin{itemize}
  \item \href{http://nanophys.khu.ac.kr/doku.php?id=lab:photos:20150114}{Welcome \& farewell party (01/14/2015)}
  \item \href{http://nanophys.khu.ac.kr/doku.php?id=lab:photos:20141030}{Fall excursion (10/30/2014)}
\end{itemize}


\end{document}
