HTTP Referrer, I hardly knew yee...

In the referrer logs for this entry:

https://blogs.msdn.com/kclemson/posts/129544.aspx

I have this:

https://my.webmd.com/content/article/71/81295.htm?lastselectedguid={5fe84e90-bc77-4056-a91c-9531713ca348}

Which doesn't make sense. Webmd isn't the kind of place where you're likely to be logged in and have your 'custom links' on the sidebar or whatnot, as I have seen elsewhere... And it's not referrer SPAM either, unless webmd is really getting desperate for hits.

Can anyone clue me in?