=== HTTP code : 200 ===

Response headers
================
HTTP/2 200 
date: Mon, 13 Jul 2026 05:51:44 GMT
server: istio-envoy
strict-transport-security: max-age=31536000; includeSubDomains; preload
content-type: text/html; charset=utf-8
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referrer-policy: same-origin
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x-envoy-upstream-service-time: 5
set-cookie: ncbi_sid=55217572A547B8B3_5503SID; Domain=.nih.gov; expires=Tue, 13 Jul 2027 05:51:44 GMT; Max-Age=31536000; Path=/
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Request headers
================
HEAD /articles/PMC6108828/ HTTP/2
Host: pmc.ncbi.nlm.nih.gov
User-Agent: WPMU DEV Broken Link Checker Local Engine
Accept: */*
Accept-Encoding: deflate, gzip, br
Referer: https://mastermanagementcorp.com
Connection: close


Link is valid.