<unk>  or patient<unk> es are collections of secondary data related to patients with a specific diagnosis, condition, or procedure, and they play an important role in post marketing surveillance of pharmaceuticals.<unk> es are different from indexes in that they contain more extensive data. In its simplest form, a<unk>  could consist of a collection of paper cards kept inside "a shoe box" by an individual physician. Most frequently<unk> es vary in sophistication from simple spreadsheets that only can be accessed by a small group of physicians to very complex databases that are accessed online across multiple institutions. They can provide health providers (or even patients) with reminders to check certain tests in order to reach certain quality goals.
Disease registry
Enterprise master patient index
Clinical decision support system
NHS treatments blacklist
Patient tracking system
Hospital information system
Clinical trial management system
Clinical data repository