A key congressional spending panel has fired a shot across the bow of two federally chartered medical foundations, warning them that the way they disclose information about donors may not pass muster. It’s the latest controversy involving the traditionally low-profile foundations, which over the past quarter-century have funneled nearly $2 billion to the National Institutes of Health (NIH) and the Centers for Disease Control and Prevention (CDC) for research, clinical trials, training, and educational programs. When Congress created the Foundation for the National Institutes of Health and the CDC Foundation in the early 1990s to raise private funds to support federal biomedical and health research, it ordered them to report “the source and amount of all gifts” they receive, as well as any restrictions on how the donations could be used. But legislators on the House of Representatives appropriations subcommittee that oversees NIH and CDC are worried the foundations may not be following those rules.