- DENMARK: Danish Civil Registration System, National Prescription Registry, National Patient Registry, Cause of death register, Medical Birth Registry, The IVF Register, The Danish Psychiatric Central Research Register, Danish National Hospital Medication Register,
- FINLAND: Population register, Care register for Health care, Prescription register, Kanta electronic prescriptions, Special Reimbursement Register, Causes of Death register, medical births register, Register of Medical abortions, Register of Congenital malformations,
- NORWAY: Population Registry, Norwegian Prescribed Drug Registry, Norwegian Patient Registry, Medical Birth Registry of Norway, Cause of Death Registry, National Education Database,
- SWEDEN : Multigenerational register, Cause of death register, National prescription registry, National patient registry, medical birth registry, Population Register.