The Agency for Healthcare Research and Quality (AHRQ) is seeking public comment on a series of white papers to support its ongoing project on “Registries for Evaluating Patient Outcomes.” The white papers, which address interfacing registries with electronic health records, stopping a registry, data linkage, and the use of registries in product safety assessment, eventually will be incorporated into a registries handbook. The public comment period ends on September 15, 2009.