However, evidence of marijuana can be found for up to 28 days after its last use in regular users.

Children were, from the earliest, regular users of the park.

How did the room's regular user light all these candles?

But even in regular users, researchers say they still saw no evidence of breathing problems.

Over half of the nation's 50 million smokers report having been regular users before they turned 18.

"One of the things we're concerned about is the effect this could have on regular wireless users."

It does not seem to have a huge effect on her, though, suggesting she is a regular user.

Which sections of the community are most likely to try heroin or become regular users?

Among teenagers who'd tried marijuana, Americans were more likely to be regular users.

These ports are beginning to mature and could soon be ready for regular users.