At Health-Link, we pride ourselves on making sure we get the correct test results each time we knock on someone's door. What we do is important and it is imperative that we do our due diligence so that you can make a proper assessment of the situation. Whether it is at a place of employment or in someone's home, we take the necessary precautions to ensure the integrity of the test is as it should be. Being a mobile company gives us an advantage that others do not have. We have the element of surprise when necessary and donors do not have the opportunity to "cheat the system" as much as when the drug screens are scheduled ahead.