This month, more than 1,000 people will gather in London for a meeting of Cochrane, the group known for its gold-standard reviews of evidence in medicine. The conference marks the 30th anniversary of an organization that helped to spark a worldwide movement to base health care on research.

But in the hallways, some attendees will be discussing whether and how the group can survive. In March, 19 of 52 groups that produce Cochrane’s systematic reviews closed after the UK National Institute for Health and Care Research (NIHR) stopped funding them. And in July, Cochrane UK in Oxford — where the group was founded — revealed that it will close next March, after the NIHR ceased its support.