The invention concerns a composition composed of several different antibodies or/and antibody fragments which is suitable as a reagent to reduce interferences in an immunological method for the class-specific detection of antibodies from one or several of the immunoglobulin classes G, M, A, D and E....http://www.google.es/patents/US5965378?utm_source=gb-gplus-sharePatente US5965378 - Antibody class-specific interference eliminating reagent
