Name	Location	Contribution
Aleksanteri Asikainen, BM	Department of Neurosurgery, University of Helsinki and Helsinki University Hospital; Department of Public Health, University of Helsinki, Finland	Drafting/revision of the article for content, including medical writing for content; study concept or design; and analysis or interpretation of data
Miikka Korja, MD, PhD	Department of Neurosurgery, University of Helsinki and Helsinki University Hospital, Finland	Drafting/revision of the article for content, including medical writing for content; major role in the acquisition of data; study concept or design; and analysis or interpretation of data
Jaakko Kaprio, MD, PhD	Institute for Molecular Medicine FIMM, University of Helsinki, Finland	Drafting/revision of the article for content, including medical writing for content; major role in the acquisition of data; study concept or design; and analysis or interpretation of data
Ilari Rautalin, MD, PhD	Department of Neurosurgery, University of Helsinki and Helsinki University Hospital, Finland; National Institute for Stroke and Applied Neurosciences, Auckland University of Technology, New Zealand	Drafting/revision of the article for content, including medical writing for content; major role in the acquisition of data; study concept or design; and analysis or interpretation of data