She says,"The higher the level of pesticide residue in the urine, the higher the risk of A.D.H.D.

VOA: special.2010.05.26

You also will wear a device that will collect urine, the body's liquid waste.

VOA: special.2011.04.06

This causes her to continuously leak urine or feces.

VOA: special.2010.08.09

Helen Free developed dry reagents for urine testing.

VOA: special.2010.11.09

Water in urine carries away waste materials.

VOA: special.2010.07.27

A urine test that detects nicotine means no job is offered.

VOA: standard.2010.02.18