=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 301 Moved permanently
Location: https://www.massgeneral.org/
Connection: close
Cache-Control: no-cache
Pragma: no-cache

HTTP/1.1 200 OK
Cache-Control: private
Content-Length: 27993
Content-Type: text/html; charset=utf-8
Server: Microsoft-IIS/8.5
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
Date: Mon, 29 Jul 2019 00:38:41 GMT
Set-Cookie: NSC_xxx.nbtthfofsbm.psh_ttm_wtfswfs=ffffffffaf17b8c245525d5f4f58455e445a4a42378b;expires=Mon, 29-Jul-2019 01:08:41 GMT;path=/;secure;httponly

Request headers
================
HEAD / HTTP/1.1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36
Host: www.massgeneral.org
Accept: */*
Referer: https://ssdp.org
Connection: close


Link is valid.