Understanding usage by children is key to studying potential harms and benefits, psychiatrists say.
The hospital reportedly demanded fingerprints and samples of handwriting to find the whistleblower.
Some 48% of hospitals in England, Wales and Northern Ireland do not have the staff they need, figures suggest.
The most detailed study of sepsis shows it is a much bigger problem than previously thought.
Provision of sign language courses for parents of deaf children is found to be "patchy".
A new licensing scheme will target non-healthcare professionals who carry out work such as lip enhancements.
Research for the BBC by NHS Digital shows a huge rise in mental and physical illness linked to cocaine.
Free bets and other incentives should be banned to make gambling safer, a letter to companies says.
New figures suggest the UK is on track to eliminate HIV transmission by 2030.
Universal Music UK have changed their work culture to be more inclusive to neurodiverse people.