The White House's "Make America Healthy Again" report cites papers that appear not to exist:

"Epidemiologist Katherine Keyes is listed... as the first author of a study on anxiety in adolescents. When NOTUS reached out to her... she was surprised to hear of the citation. She does study mental health and substance use, she said. But she didn’t write the paper listed."

NOTUS couldn't find the paper in the cited journal, and I've verified the claimed DOI doesn't resolve: https://www.notus.org/health-science/make-america-healthy-again-report-citation-errors