Source:http://linkedlifedata.com/resource/umls/id/C1522577
NCI: Monitoring a person's health over time after treatment. This includes keeping track of the health of people who participate in a clinical study or clinical trial for a period of time, both during the study and after the study ends.,NCI: The process by which information about the health status of a subject is obtained after the subject is no longer receiving study medication.,NCI: The process by which information about the health status of an individual is obtained after a study has officially closed; an activity that continues something that has already begun or that repeats something that has already been done.