Skip to content
    Moz logo Menu open Menu close
    • Products
      • Moz Pro
      • Moz Pro Home
      • Moz Local
      • Moz Local Home
      • STAT
      • Moz API
      • Moz API Home
      • Compare SEO Products
      • Moz Data
    • Free SEO Tools
      • Domain Analysis
      • Keyword Explorer
      • Link Explorer
      • Competitive Research
      • MozBar
      • More Free SEO Tools
    • Learn SEO
      • Beginner's Guide to SEO
      • SEO Learning Center
      • Moz Academy
      • MozCon
      • Webinars, Whitepapers, & Guides
    • Blog
    • Why Moz
      • Digital Marketers
      • Agency Solutions
      • Enterprise Solutions
      • Small Business Solutions
      • The Moz Story
      • New Releases
    • Log in
    • Log out
    • Products
      • Moz Pro

        Your all-in-one suite of SEO essentials.

      • Moz Local

        Raise your local SEO visibility with complete local SEO management.

      • STAT

        SERP tracking and analytics for enterprise SEO experts.

      • Moz API

        Power your SEO with our index of over 44 trillion links.

      • Compare SEO Products

        See which Moz SEO solution best meets your business needs.

      • Moz Data

        Power your SEO strategy & AI models with custom data solutions.

      Turn SEO data into actionable Content Briefs
      Moz Pro

      Turn SEO data into actionable Content Briefs

      Learn more
    • Free SEO Tools
      • Domain Analysis

        Get top competitive SEO metrics like DA, top pages and more.

      • Keyword Explorer

        Find traffic-driving keywords with our 1.25 billion+ keyword index.

      • Link Explorer

        Explore over 40 trillion links for powerful backlink data.

      • Competitive Research

        Uncover valuable insights on your organic search competitors.

      • MozBar

        See top SEO metrics for free as you browse the web.

      • More Free SEO Tools

        Explore all the free SEO tools Moz has to offer.

      NEW Keyword Suggestions by Topic
      Moz Pro

      NEW Keyword Suggestions by Topic

      Learn more
    • Learn SEO
      • Beginner's Guide to SEO

        The #1 most popular introduction to SEO, trusted by millions.

      • SEO Learning Center

        Broaden your knowledge with SEO resources for all skill levels.

      • On-Demand Webinars

        Learn modern SEO best practices from industry experts.

      • How-To Guides

        Step-by-step guides to search success from the authority on SEO.

      • Moz Academy

        Upskill and get certified with on-demand courses & certifications.

      • MozCon

        Save on Early Bird tickets and join us in London or New York City

      Access 20 years of data with flexible pricing
      Moz API

      Access 20 years of data with flexible pricing

      Find your plan
    • Blog
    • Why Moz
      • Digital Marketers

        Simplify SEO tasks to save time and grow your traffic.

      • Small Business Solutions

        Uncover insights to make smarter marketing decisions in less time.

      • Agency Solutions

        Earn & keep valuable clients with unparalleled data & insights.

      • Enterprise Solutions

        Gain a competitive edge in the ever-changing world of search.

      • The Moz Story

        Moz was the first & remains the most trusted SEO company.

      • New Releases

        Get the scoop on the latest and greatest from Moz.

      Surface actionable competitive intel
      New Feature

      Surface actionable competitive intel

      Learn More
    • Log in
      • Moz Pro
      • Moz Local
      • Moz Local Dashboard
      • Moz API
      • Moz API Dashboard
      • Moz Academy
    • Avatar
      • Moz Home
      • Notifications
      • Account & Billing
      • Manage Users
      • Community Profile
      • My Q&A
      • My Videos
      • Log Out

    The Moz Q&A Forum

    • Forum
    • Questions
    • Users
    • Ask the Community

    Welcome to the Q&A Forum

    Browse the forum for helpful insights and fresh discussions about all things SEO.

    1. Home
    2. SEO Tactics
    3. Technical SEO
    4. Links from PubMed (nlm.nih.gov) not appearing in backlinks for articles

    Moz Q&A is closed.

    After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.

    Links from PubMed (nlm.nih.gov) not appearing in backlinks for articles

    Technical SEO
    2
    3
    1103
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as question
    Log in to reply
    This topic has been deleted. Only users with question management privileges can see it.
    • aafpitadmin
      aafpitadmin last edited by

      Content from our medical journals gets indexed by the National Library of Medicine / PubMed on a monthly basis. The link to the full article appears in the upper-right corner on PubMed, yet I'm unable to find PubMed (nlm.nih.gov) backlinks in the reporting tools.

      Example:
      Article Title: Respiratory Syncytial Virus Infection in Children (allintitle query)
      Article URL: http://www.aafp.org/afp/2011/0115/p141.html
      PubMed URL: http://www.ncbi.nlm.nih.gov/pubmed/21243988

      The PubMed link is to http://www.aafp.org/link_out?pmid=21243988 ,
      a 301 redirect to the article, http://www.aafp.org/afp/2011/0115/p141.html

      Any idea why this link isn't appearing in backlinks? This isn't just for one article, we have roughly 2,000 articles from 1998 to the present. Articles from the past 12-months are access-restricted, and after 12-months the articles become public.

      1 Reply Last reply Reply Quote 0
      • aafpitadmin
        aafpitadmin last edited by

        I feel very silly for posting this question.

        Looking at the Pubmed source:

        Doh!

        1 Reply Last reply Reply Quote 1
        • Host1
          Host1 last edited by

          The reason for this is most likely the use of a "out-link" with 301 redirect. Not 100% sure, but i would assume this is the reason for it not appearing in backlinks.

          1 Reply Last reply Reply Quote 0
          • 1 / 1
          • First post
            Last post

          Got a burning SEO question?

          Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.


          Start my free trial


          Browse Questions

          Explore more categories

          • Moz Tools

            Chat with the community about the Moz tools.

          • SEO Tactics

            Discuss the SEO process with fellow marketers

          • Community

            Discuss industry events, jobs, and news!

          • Digital Marketing

            Chat about tactics outside of SEO

          • Research & Trends

            Dive into research and trends in the search industry.

          • Support

            Connect on product support and feature requests.

          • See all categories

          Related Questions

          • AL123al

            Size of image for article Schema

            Hi, I implemented schema markup for an article and all tested fine and I can see it being fired in preview mode of Google Tag Manager. But when I run the URL which has it applied through Google Structured Testing tool it is not appearing. I have now read that the image needs to be a certain size. For AMP articles this appears to be 12oo pixels wide http://www.thesempost.com/google-changes-image-size-requirements-amp-articles/ But what about non-AMP articles? Does it need to be that big too?

            Technical SEO | | AL123al
            0
          • CuriosityMedia

            How does link juice flow through hreflang?

            We want to use the hreflang tag on our site (direct users searching for the Spanish version of spanishdict.com to spanishdict.com/traductor). Before doing so, we were wondering how link juice flows through hreflang? Any insight or resources on this would be very helpful. Thanks!

            Technical SEO | | CuriosityMedia
            0
          • mshowells

            Fake Links indexing in google

            Hello everyone, I have an interesting situation occurring here, and hoping maybe someone here has seen something of this nature or be able to offer some sort of advice. So, we recently installed a wordpress to a subdomain for our business and have been blogging through it. We added the google webmaster tools meta tag and I've noticed an increase in 404 links. I brought this up to or server admin, and he verified that there were a lot of ip's pinging our server looking for these links that don't exist. We've combed through our server files and nothing seems to be compromised. Today, we noticed that when you do site:ourdomain.com into google the subdomain with wordpress shows hundreds of these fake links, that when you visit them, return a 404 page. Just curious if anyone has seen anything like this, what it may be, how we can stop it, could it negatively impact us in anyway? Should we even worry about it? Here's the link to the google results. https://www.google.com/search?q=site%3Amshowells.com&oq=site%3A&aqs=chrome.0.69i59j69i57j69i58.1905j0j1&sourceid=chrome&es_sm=91&ie=UTF-8 (odd links show up on pages 2-3+)

            Technical SEO | | mshowells
            0
          • Twist360

            Should we nofollow footer social links?

            Like most sites today we have a whole raft of social links in our footer, these are on every page of the site and link out to Facebook, Twitter, YouTube, etc Should these links be nofollow to avoid juice leaving our site or would you recommend allowing them to be followed to increase the power of these social sites? Is there a definitive Yay or Na on these social links?

            Technical SEO | | Twist360
            0
          • janc

            Footer Links with same anchor text on all pages

            We have different websites targeted at the different services our company provides. (e.g. For our document storage services, we have www.ukdocumentstorage.com. For document management, we have www.document-management-solutions.co.uk). If we take the storage site for example, every single page has a link in the footer to our document management site, with the anchor text 'Cleardata Document Management' SEOMoz is telling me that these are seen as external links (as they are on a different URL's), and I'm just clarifying that would this be a major possible factor in the website not ranking highly? How should I rectify this issue?

            Technical SEO | | janc
            0
          • JorgeUmana

            Is there a suggested limit to the amount of links on a sitemap?

            Currently, I have an error on my moz dashboard indicating there are too many links on one of my pages.  That page is the sitemap.  It was my understanding all internal pages should be linked to the sitemap. Can any mozzers help clarify the best practice here? Thanks, Clayton

            Technical SEO | | JorgeUmana
            0
          • glennfriesen

            Does the Referral Traffic from a Link Influence the SEO Value of that Link?

            If a link exists, and nobody clicks on it, could it still be valuable for SEO? Say I have 1000 links on 500 sites with Domain Authority ranging from 35 to 80. Let's pretend that 900 of those links generate referral traffic. Let's assume that the remaining 100 links are spread between 10 domains of the 500, but nobody ever clicks on them. Are they still valuable? Should an SEO seek to earn more links like those, even though they don't earn referral traffic? Does Google take referral data into account in evaluating links? 5343313-zelda-rogers-albums-zelda-pictures-duh-what-else-would-they-be-picture3672t-link-looks-so-lonely.jpg Sad%20little%20link.jpg

            Technical SEO | | glennfriesen
            1
          • Aspedia

            Add to Cart Link

            We have shopping cart links (<a href's,="" not="" input="" buttons)="" that="" link="" to="" a="" url="" along="" the="" lines="" of="" cart="" add="" 123&return="/product/123. </p"></a> <a href's,="" not="" input="" buttons)="" that="" link="" to="" a="" url="" along="" the="" lines="" of="" cart="" add="" 123&return="/product/123. </p">The SEOMoz site crawls are flagging these as a massive number of 302 redirects and I also wonder what sort of effect this is having on linkjuice flowing around the site. </a> <a href's,="" not="" input="" buttons)="" that="" link="" to="" a="" url="" along="" the="" lines="" of="" cart="" add="" 123&return="/product/123. </p">I can see several possible solutions: Make the links nofollow Make the links input buttons Block /cart/add with robots.txt Make the links 301 instead of 302 Make the links javascript (probably worst care) All of these would result in an identical outcome for the UX, but are very different solutions. What would you suggest?</a>

            Technical SEO | | Aspedia
            0

          Get started with Moz Pro!

          Unlock the power of advanced SEO tools and data-driven insights.

          Start my free trial
          Products
          • Moz Pro
          • Moz Local
          • Moz API
          • Moz Data
          • STAT
          • Product Updates
          Moz Solutions
          • SMB Solutions
          • Agency Solutions
          • Enterprise Solutions
          • Digital Marketers
          Free SEO Tools
          • Domain Authority Checker
          • Link Explorer
          • Keyword Explorer
          • Competitive Research
          • Brand Authority Checker
          • Local Citation Checker
          • MozBar Extension
          • MozCast
          Resources
          • Blog
          • SEO Learning Center
          • Help Hub
          • Beginner's Guide to SEO
          • How-to Guides
          • Moz Academy
          • API Docs
          About Moz
          • About
          • Team
          • Careers
          • Contact
          Why Moz
          • Case Studies
          • Testimonials
          Get Involved
          • Become an Affiliate
          • MozCon
          • Webinars
          • Practical Marketer Series
          • MozPod
          Connect with us

          Contact the Help team

          Join our newsletter
          Moz logo
          © 2021 - 2025 SEOMoz, Inc., a Ziff Davis company. All rights reserved. Moz is a registered trademark of SEOMoz, Inc.
          • Accessibility
          • Terms of Use
          • Privacy

          Looks like your connection to Moz was lost, please wait while we try to reconnect.