Study protocol: MRI-based assessment of cerebral blood flow under pharmacologically elevated blood pressure in patients under general anesthesia, and in sedated ICU patients with aneurysmal subarachnoid hemorrhage - Jonas Österlind; Johan Birnefeld; Elin Birnefeld; Magnus Hultin; Sara Qvarlander; Anders Wåhlin; Petter Holmlund; Laleh Zarrinkoob (PLoS ONE, 2025)