Smartphones i geolocalització per estudiar la drogodependčncia <a href="http://www.npr.org/2011/11/20/142554574/in-baltimore-mapping-the-world-of-addiction?ft=1&amp;f=1003">http://www.npr.org/2011/11/20/142554574/in-baltimore-mapping-the-world-of-addiction?ft=1&amp;f=1003</a><br>
<br>Raf<br>