Hycor Biomedical can help doctors answer the age old question, "What seems to be the problem?" The company makes medical diagnostic allergy and autoimmune products, which are used in clinical laboratories, hospitals and doctors' offices worldwide. Using its enzyme immunoassay (EIA) technology, the company produces the HYTEC allergy diagnosis system and related chemical reagents and assays, as well as AUTOSTAT kits for detecting rheumatoid arthritis and other autoimmune diseases. Hycor Biomedical is held by private equity firm Linden LLC. Founded in 1981, the company has expanded through acquisitions. It exited its urinalysis business in 2013 in order to focus on the allergy and autoimmune markets.