Jenna Norton, a National Institutes of Health employee, has been an outspoken critic of the administration’s research cuts and has been on paid leave.Jenna Norton last spring organized The Bethesda Declaration, a public letter that denounced what its authors viewed as the administration’s dismantling of the federal biomedical research apparatus.

Researchers believe increasing use of cannabis may be contributing to a rise in new cases of schizophrenia and related disorders at younger ages.The study’s lead author said the results suggested an urgent need for more research into the impact of expanding use of cannabis by young people.

Ostarine held the promise of profound medical treatments. Something unexpected happened on the way to F.D.A. approval.

The physician work force is aging fast, and some hospitals now require that older clinicians undergo testing for cognitive decline. Many have resisted.

While at the federal agency, he approved the laser device for eye surgery but later warned of its potential to cause harm.