Background: Studies suggest that the Thin-Layer Rapid-Use Epicutaneous Test (TRUE Test) may be inadequate to completely diagnose a significant number of patients with allergic contact dermatitis ...

All patients who were patch-tested between July 1, 2000, and June 30, 2004, with the TRUE Test at the clinics of four dermatologists (referred to as physicians 1, 2, 3, and 4) in private practice ...