Fig. 2From: Perfusion by Arterial Spin labelling following Single dose Tadalafil In Small vessel disease (PASTIS): study protocol for a randomised controlled trialStandard Protocol Items: Recommendations for Interventional Trials (SPIRIT) checklist: schedule of enrolment, interventions and assessments in the Perfusion by Arterial Spin labelling following Single dose Tadalafil In Small vessel disease (PASTIS) trial. From PASTIS protocol version 4, 27 Jan 2016Back to article page