. 2011 Dec 13;13(4):e111. doi: 10.2196/jmir.1672
©Julia EWC van Gemert-Pijnen, Nicol Nijland, Maarten van Limburg, Hans C Ossebaard, Saskia M Kelders, Gunther Eysenbach, Erwin R Seydel. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 13.12.2011.
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