Follow-up of Patients With Stroke Based on Opt-out Choice: Potential Approach for Acute Care Quality Registries or Observational Studies.

Napierkowski I, Lorenz-Meyer I, Hille A, Ebinger M, Freitag E, Harmel P, Endres M, Hagemann G, Koennecke HC, Mackert BM, Siegerink B, Audebert HJ; Berlin–SPecific Acute Treatment in Ischemic or hAemorrhagic Stroke With Long Term Follow-up (B-SPATIAL) registry.