<!DOCTYPE html><html lang="es" id="" class="nojs esm" data-root="https://medlineplus.gov/"> <head> <meta charset="utf-8" /> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" /> <meta http-equiv="window-target" content="_top" /> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1" /> <meta name="robots" content="noindex" /> <meta name="ac-dictionary" content="medlineplus-spanish-ac-dictionary" /> <meta name="NLMDC.Date.Expiration" content="2017-04-05"/> <link rel="shortcut icon" href="https://medlineplus.gov/images/favicon_sp.ico" type="image/x-icon" /> <link rel="apple-touch-icon" href="https://medlineplus.gov/images/touch-icon_sp.png" /> <meta property="fb:app_id" content="824697010995507" /> <meta property="og:title" content="MedlinePlus: Lo sentimos, pero no hemos podido encontrar la p&#225;gina que usted ha solicitado." /> <title>MedlinePlus: Lo sentimos, pero no hemos podido encontrar la página que usted ha solicitado.</title> <link rel="stylesheet" href="https://medlineplus.gov/css/common_new.css?1701805024053" /> <!--[if IE 8]> <link rel="stylesheet" href="https://medlineplus.gov/css/ie8/common.css"> <![endif]--> <link rel="stylesheet" href="https://medlineplus.gov/uswds/css/uswds_styles.css" /> <link rel="stylesheet" href="https://medlineplus.gov/utilities/lostatic_sp.css" id="lostatic" media="all"/> <!--[if IE 8]> <link href="https://medlineplus.gov/utilities/ie8lostatic_sp.css" type="text/css" rel="stylesheet" media="all"/> <![endif]--> <script type="text/javascript">document.getElementsByTagName('html')[0].className = document.getElementsByTagName('html')[0].className.replace( /(?:^|\s)nojs(?!\S)/g , '').trim();</script> <script src="https://medlineplus.gov/uswds/js/uswds-init.min.js" type="text/javascript"></script> <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0], j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src= 'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f); })(window,document,'script','dataLayer','GTM-MMVM77');</script> </head> <body> <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-MMVM77" height="0" width="0" style="display:none;visibility:hidden" title="googletagmanager"></iframe></noscript> <a name="top" id="top"></a> <a class="hide-offscreen" href="#start">Omita y vaya al Contenido</a> <section class="usa-banner" aria-label="Un sitio oficial del Gobierno de Estados Unidos"> <div class="usa-accordion"> <header class="usa-banner__header"> <div class="usa-banner__inner"> <div class="grid-col-auto"> <img aria-hidden="true" class="usa-banner__header-flag" src="https://medlineplus.gov/uswds/img/us_flag_small.png" alt="" /> </div> <div class="grid-col-fill tablet:grid-col-auto" aria-hidden="true"> <p class="usa-banner__header-text"> Un sitio oficial del Gobierno de Estados Unidos </p> <p class="usa-banner__header-action"> Así es como usted puede verificarlo </p> </div> <button type="button" class="usa-accordion__button usa-banner__button" aria-expanded="false" aria-controls="gov-banner-spanish-lang-es" > <span class="usa-banner__button-text" >Así es como usted puede verificarlo</span > </button> </div> </header> <div class="usa-banner__content usa-accordion__content" id="gov-banner-spanish-lang-es" > <div class="grid-row grid-gap-lg"> <div class="usa-banner__guidance tablet:grid-col-6"> <img class="usa-banner__icon usa-media-block__img" src="https://medlineplus.gov/uswds/img/icon-dot-gov.svg" role="img" alt="" aria-hidden="true" /> <div class="usa-media-block__body"> <p> <strong>Los sitios web oficiales usan .gov</strong><br />Un sitio web <strong>.gov</strong> pertenece a una organización oficial del Gobierno de Estados Unidos. </p> </div> </div> <div class="usa-banner__guidance tablet:grid-col-6"> <img class="usa-banner__icon usa-media-block__img" src="https://medlineplus.gov/uswds/img/icon-https.svg" role="img" alt="" aria-hidden="true" /> <div class="usa-media-block__body"> <p> <strong>Los sitios web seguros .gov usan HTTPS</strong><br />Un <strong>candado</strong> ( <span class="icon-lock" ><svg xmlns="http://www.w3.org/2000/svg" width="52" height="64" viewBox="0 0 52 64" class="usa-banner__lock-image" role="img" aria-labelledby="banner-lock-description-spanish" focusable="false" > <title id="banner-lock-title-spanish">Lock</title> <desc id="banner-lock-description-spanish">Locked padlock icon</desc> <path fill="#000000" fill-rule="evenodd" d="M26 0c10.493 0 19 8.507 19 19v9h3a4 4 0 0 1 4 4v28a4 4 0 0 1-4 4H4a4 4 0 0 1-4-4V32a4 4 0 0 1 4-4h3v-9C7 8.507 15.507 0 26 0zm0 8c-5.979 0-10.843 4.77-10.996 10.712L15 19v9h22v-9c0-6.075-4.925-11-11-11z" /> </svg> </span >) o <strong>https://</strong> significa que usted se conectó de forma segura a un sitio web .gov. 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