Source:http://linkedlifedata.com/resource/umls/id/C0018904
MSH: Serologic tests in which a known quantity of antigen is added to the serum prior to the addition of a red cell suspension. Reaction result is expressed as the smallest amount of antigen which causes complete inhibition of hemagglutination.,HL7V3.0: <p>Agglutination, Hemagglutination inhibition</p>