Lincoln Diagnostics, manufacturer of - Multi-Test® PC UniTest® PC Duotip-Test® II Multi-Test® II Multi-Test® Duotip-Test® - is the leader in high-quality, disposable, allergy skin-test devices. Lincoln products are the most widely used disposable allergy tests in the U.S.A, Canada, and Mexico, and are extensively employed at leading teaching institutions, hospitals and private clinics in over 55 countries (CE and ISO 13485-certified). Need to know more? There are 65+ studies available in domestic and foreign journals. We welcome your request for additional information.