[1] Karolinska Inst, Dept Physiol & Pharmacol, Stockholm, Sweden
[2] Karolinska Univ Hosp, Hyperbar Med Perioperat Med & Intens Care, Stockholm, Sweden
[3] Karolinska Inst, Inst Womens & Childrens Hlth, Neuropediat Unit, Stockholm, Sweden
[4] Karolinska Inst, Dept Med Solna, Div Infect Dis, Stockholm, Sweden
[5] Karolinska Univ Hosp, Dept Infect Dis, Stockholm, Sweden
[6] Karolinska Univ Hosp, Dept Neurosurg, Stockholm, Sweden
[7] Karolinska Inst, Dept Clin Neurosci, Stockholm, Sweden
[8] Rigshosp, Dept Neurosurg, Copenhagen, Denmark
[9] Univ Calif San Diego, Sch Med, Dept Emergency Med, Div Hyperbar Med, La Jolla, CA 92093 USA