An immunoassay device and assay to detect an antigen, such as PSA, in a biological sample. The device comprises a solid support having multiple reaction zones containing capture antibodies directed to the antigen. Exposure of a test sample to a mixture of incubation antibodies with known and different...http://www.google.es/patents/US7300761?utm_source=gb-gplus-sharePatente US7300761 - Methods and device for detecting prostate specific antigen (PSA)
Methods and device for detecting prostate specific antigen (PSA)