{{Cite journal| doi = 10.1186/s13063-025-09099-9| issn = 1745-6215 (Electronic)| volume = 26| issue = 1| pages = 422| last1 = Messmer| first1 = A. S.| last2 = Pitteloud| first2 = M.| last3 = Quintard| first3 = H.| last4 = Pietsch| first4 = U.| last5 = Muller| first5 = M.| last6 = Filipovic| first6 = M.| last7 = Jakob| first7 = S. M.| last8 = Z'Graggen| first8 = W. J.| last9 = Schefold| first9 = J. C.| last10 = Pfortmueller| first10 = C. A.| title = CRYSTALLBrain: crystalloid fluid choice and neurological outcome in patients with non-traumatic subarachnoid haemorrhage-a study protocol for a multi-centre randomised double-blind clinical trial| journal = Trials| date = 2025-10-18| pmid = 41107997}}