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1 Kadoorie Centre for Critical Care Research, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford OX3 9DU, UK; The George Institute for Global Health, Newtown, NSW, Australia. Electronic address: christopher.andersen@ndcn.ox.ac.uk.
2 Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada; School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada.
3 Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada.
4 Department of Neurosurgery, Mannheim University Hospital, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany.
5 Department of Neurology and Neurosurgery, University Medical Centre Utrecht, Utrecht University, Utrecht, Netherlands.
1 Kadoorie Centre for Critical Care Research, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford OX3 9DU, UK; The George Institute for Global Health, Newtown, NSW, Australia. Electronic address: christopher.andersen@ndcn.ox.ac.uk.
2 Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada; School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada.
3 Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada.
4 Department of Neurosurgery, Mannheim University Hospital, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany.
5 Department of Neurology and Neurosurgery, University Medical Centre Utrecht, Utrecht University, Utrecht, Netherlands.