"followup" in the noun sense
1. follow-up, followup
a piece of work that exploits or builds on earlier work
"his new software is a follow-up to the programs they started with"
2. follow-up, followup
an activity that continues something that has already begun or that repeats something that has already been done
3. follow-up, followup, reexamination, review
a subsequent examination of a patient for the purpose of monitoring earlier treatment
Source: WordNet® (An amazing lexical database of English)
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