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\bibitem{Yang_etal2006} {\textquotedblleft}\textit{Demonstration of lanthanum in liver cells by energy-dispersive X-ray spectroscopy, electron energy loss spectroscopy and high-resolution transmission electron microscopy}{\textquotedblright}. Yang Z, Schryvers D, Roels F, d{\textquoteright} Haese PC, de Broe ME, Journal of microscopy \textbf{223}, 133 (2006).   http://doi.org/10.1111/j.1365-2818.2006.01601.x

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