[1] European Assoc Neurosurg Soc, Eth Comm, Brussels, Belgium
[2] Haaglanden Med Ctr, Dept Neurosurg, Lijnbaan 32, NL-2512 VA The Hague, Netherlands
[3] Leiden Univ, Med Ctr, Lijnbaan 32, NL-2512 VA The Hague, Netherlands
[4] Leiden Univ, Unit Eth & Hlth Care, Lijnbaan 32, NL-2512 VA The Hague, Netherlands
[5] Beaumont Hosp, Dept Clin Neurosci, Dublin, Ireland
[6] Copenhagen Univ Hosp, Rigshosp, Dept Neurosurg, Blegdamsvej 9, DK-2100 Copenhagen, Denmark
[7] Univ Copenhagen, Dept Clin Med, Copenhagen, Denmark
[8] Karolinska Intitutet, Sect Neurosurg, Dept Clin Neurosci, Stockholm, Sweden
[9] Hosp Univ Donostia, Dept Neurosurg, San Sebastian, Spain