Sodium Valproate and Stroke Risk Cervical Artery Dissection in Stroke Study (CADISS) DNA Lacunar 2 Apathy and Outcome After Stroke Computerised Aphasia Therapy for Chronic Aphasia (CATChES) OPTIMAL Imaging Carotid Atheroma in the Recovery and Understanding of Severity in Stroke study (ICARUSS) Brain Network Analysis and Cognition in Small Vessel Disease (NETWORKS) How intensively should we treat blood pressure in established cerebral small vessel disease? (PRESERVE) Vertebral artery Ischaemia Stenting Trial (VIST)