Data sources include setting specific information structures, and disease-specific registers and data sources. Much of Portugal’s rich data infrastructure is thanks to the use of electronic patient records and unique patient identifiers. These records go towards creating the Portuguese Health Data Platform (PDS), which consists of a Patient Portal (Portal Do Utente, launched May 2012), a Professional Portal (Portal Do Professional, launched June 2012), an Institutional Portal (Portal Institutional, under testing) and an International Portal (Portal Intemacional.