<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0212-1611</journal-id>
<journal-title><![CDATA[Nutrición Hospitalaria]]></journal-title>
<abbrev-journal-title><![CDATA[Nutr. Hosp.]]></abbrev-journal-title>
<issn>0212-1611</issn>
<publisher>
<publisher-name><![CDATA[Grupo Arán]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0212-16112017000300693</article-id>
<article-id pub-id-type="doi">10.20960/nh.469</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Anorexia y bulimia nerviosas: difusión virtual de la enfermedad como estilo de vida]]></article-title>
<article-title xml:lang="en"><![CDATA[Anorexia and bulimia nervosa: virtual diffusion of the disease as a lifestyle]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lladó]]></surname>
<given-names><![CDATA[Gina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Soltero]]></surname>
<given-names><![CDATA[Rocío]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Blanco]]></surname>
<given-names><![CDATA[María José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital de la Santa Cruz y San Pablo Instituto de Investigación Biomédica Servicio de Ensayos Clínicos]]></institution>
<addr-line><![CDATA[Barcelona ]]></addr-line>
<country>Spain</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Europea de Madrid Facultad de Ciencias Biomédicas Departamento de Ciencias Biomédicas Básicas]]></institution>
<addr-line><![CDATA[Madrid ]]></addr-line>
<country>Spain</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2017</year>
</pub-date>
<volume>34</volume>
<numero>3</numero>
<fpage>693</fpage>
<lpage>701</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_arttext&amp;pid=S0212-16112017000300693&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_abstract&amp;pid=S0212-16112017000300693&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_pdf&amp;pid=S0212-16112017000300693&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción:  la adolescencia es un periodo vulnerable para padecer trastornos de la conducta alimentaria (TCA) como la anorexia y la bulimia nerviosas. La insatisfacción corporal, uno de los factores precipitantes de los TCA, conduce a las adolescentes a la búsqueda de información sobre dietas en internet. En este contexto, las páginas pro-Ana (proanorexia) y pro-Mía (probulimia) difunden contenidos altamente perjudiciales para la salud relacionados con la pérdida de peso y los TCA.  Objetivos:  en el presente trabajo se analizan la cantidad, el posicionamiento, la calidad y la difusión de las páginas pro-Ana y pro-Mía.  Métodos:  se realizó una búsqueda de páginas web en el navegador Google Chrome con las palabras clave "anorexia", "bulimia", "trastornos de la conducta alimentaria (TCA)", "Ana y Mía", "pro-Ana y pro-Mía", "anorexic nation", "obesidad", "estilos de vida saludables" y "nutrición saludable". Se seleccionaron los 20 primeros resultados de cada búsqueda según los índices de posicionamiento de PageRank y se analizó la calidad de dichos recursos mediante un cuestionario. Para el estudio de la difusión de páginas pro-Ana y pro-Mía en redes sociales como Facebook y Twitter se utilizó el programa SharedCount.  Resultados:  pro-Ana y pro-Mía dieron más de un millón de entradas, siendo páginas mal posicionadas, de tipo blog en su mayoría, con mayor difusión en Facebook y Twitter comparadas con otras de mejor calidad.  Conclusiones:  pro-Ana y pro-Mía son recursos con una clara intencionalidad de contactar con personas que padecen un TCA o están en riesgo, con el fin de reforzar la comunicación entre ellas a través de la blogosfera.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction:  Adolescence is a vulnerable period for the onset of eating disorders (ED) such as anorexia and bulimia nervosas. Body dissatisfaction, a precipitating factor for ED, leads adolescents to seek information on the Internet about diets. In this context, pro-Ana (proanorexia) and pro-Mia (probulimia) are on-line pages that promulgate highly harmful contents for health related to weight loss and ED.  Objectives:  The aim of this study was to analyze quantity, quality and social diffusion strategies used by pro-Ana and pro-Mia webpages.  Methods:  A web search was done in the Google Chrome browser, using the keywords "anorexia", "bulimia", "eating disorders", "Ana and Mia", "pro-Ana and pro-Mia", "anorexic nation", "obesity", "healthy lifestyles" and "healthy nutrition". The top 20 results for each search were selected and analyzed according to positioning rates (PageRank, PR). The quality of these resources was analyzed by a previously published questionnaire. Finally, a study of the diffusion in social networks like Facebook and Twitter was performed for pro-Ana and pro-Mia pages using SharedCount.  Results:  Searches for pro-Ana and pro-Mia reported more than a million entries, The pages were poorly positioned, Blog contents were the most shared between all the analyzed pages.  Conclusions:  pro-Ana and pro-Mia are resources with a clear intention to establish a contact with people with an eating disorder or who are at risk for developing one, in order to strengthen the communication through the blogosphere.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Anorexia]]></kwd>
<kwd lng="es"><![CDATA[Bulimia]]></kwd>
<kwd lng="es"><![CDATA[pro-Ana]]></kwd>
<kwd lng="es"><![CDATA[pro-Mía]]></kwd>
<kwd lng="es"><![CDATA[Obesidad]]></kwd>
<kwd lng="es"><![CDATA[Estilos de vida saludables]]></kwd>
<kwd lng="es"><![CDATA[Nutrición saludable]]></kwd>
<kwd lng="en"><![CDATA[Anorexia]]></kwd>
<kwd lng="en"><![CDATA[Bulimia]]></kwd>
<kwd lng="en"><![CDATA[pro-Ana]]></kwd>
<kwd lng="en"><![CDATA[pro-Mia]]></kwd>
<kwd lng="en"><![CDATA[Obesity]]></kwd>
<kwd lng="en"><![CDATA[Healthy lifestyle]]></kwd>
<kwd lng="en"><![CDATA[Healthy nutrition]]></kwd>
</kwd-group>
</article-meta>
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