Severe cases were tied to high risk for depression, post-traumatic stress disorder

Decades-long review revealed risk of brain disease is dropping, while age at diagnosis is going up

Germs on mats, helmets are likely culprits, but skin checks and hygiene might help cut risk, experts say

But the effect was small and experts say there's no reason to switch to other painkillers

But those under 35, and especially women, may not reap as much benefit

Germs on mats, helmets are likely culprits, but skin checks and hygiene might help cut risk, experts say

But the effect was small and experts say there's no reason to switch to other painkillers

But those under 35, and especially women, may not reap as much benefit

Study reports decrease among recent entrants from Mexico, China, India, Philippines and Vietnam

New research counters 2015 finding that said pot use and related problems doubled over a decade