=== HTTP code : 200 ===

Response headers
================
HTTP/1.0 301 Moved Permanently
Date: Mon, 15 Apr 2019 06:10:51 GMT
Server: Apache
Referrer-Policy: origin-when-cross-origin
Location: https://www.ncbi.nlm.nih.gov/pubmed/26147775
Connection: close
Content-Type: text/html; charset=iso-8859-1

HTTP/2 200 
date: Mon, 15 Apr 2019 06:10:52 GMT
server: Apache
strict-transport-security: max-age=31536000; includeSubDomains; preload
referrer-policy: origin-when-cross-origin
content-security-policy: upgrade-insecure-requests
cache-control: private
ncbi-phid: CE8A8558CB4142E10000000009180655.m_15
ncbi-sid: CE8A8558CB4206C1_2328SID
content-type: text/html; charset=UTF-8
set-cookie: ncbi_sid=CE8A8558CB4206C1_2328SID; domain=.nih.gov; path=/; expires=Wed, 15 Apr 2020 06:10:52 GMT
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x-ua-compatible: IE=Edge
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Request headers
================
HEAD /pubmed/26147775 HTTP/2
Host: www.ncbi.nlm.nih.gov
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Accept: */*
Referer: https://itxdesign.com
Connection: close


Link is valid.