404. That’s an error.
The requested URL /bookmarks/mark?op=add&bkmk=http%3A//stroke.ahajournals.org/content/early/2017/05/11/STROKEAHA.117.016694&title=Clinical%20Correlates%2C%20Ethnic%20Differences%2C%20and%20Prognostic%20Implications%20of%20Perivascular%20Spaces%20in%20Transient%20Ischemic%20Attack%20and%20Ischemic%20Stroke
was not found on this server. That’s all we know.