NCIt definition : 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.;
Alternative definition : CDISC: The process by which information about the health status of a subject is obtained
after the subject is no longer receiving study medication.; NCI-GLOSS: 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.;