http://www.helium.com/knowledge/168083-how-to-correctly-do-a-24-hour-urine-collection.xml Helium.com > Kidney & Urologic Diseases > How to correctly do a 24-hour urine collection en-us Copyright Helium.com Wed, 28 May 2008 21:24:53 GMT Wed, 28 May 2008 21:24:53 GMT