A call for research to address the threat of paper mills.

Research paper mills are covert organizations that provide low-quality or fabricated manuscripts to paying clients. As members of the United2Act Research Working Group, we propose 5 key research questions on paper mills that require resourcing and support. Research paper mills are covert organizations that provide low quality or fabricated manuscripts to paying clients. This Perspective, written by members of the United2Act Research Working Group, proposes five key research questions on paper mills that require resourcing and support. [ABSTRACT FROM AUTHOR]