Source:http://linkedlifedata.com/resource/umls/id/C0010362
MSH: Studies in which the presence or absence of disease or other health-related variables are determined in each member of the study population or in a representative sample at one particular time. This contrasts with LONGITUDINAL STUDIES which are followed over a period of time.,NCI: A study in which participants are examined at only a single time for characteristics of a disease.