The bmj.com specialty collections provide an alternate route to more than 50,000 BMJ articles. This page lists sponsored BMJ Group portals, which pull in articles from the BMJ and sister products, and 230+ clinical and 60+ non-clinical topics from the BMJ. There is also a full list of past and present BMJ series at the foot of the page. Another page we have created lists article clusters. These are links to articles on a specific topic that went online at roughly the same time, and usually appeared in a single print issue.