[1] Copenhagen Univ Hosp, Dept Pediat & Adolescent Med, Rigshosp, DK-2100 Copenhagen, Denmark
[2] Univ Copenhagen, Rigshosp, Copenhagen Neuromuscular Ctr, Dept Neurol, DK-2100 Copenhagen, Denmark
[3] Univ Copenhagen, Dept Clin Med, DK-2200 Copenhagen, Denmark
[4] Copenhagen Univ Hosp, Dept Clin Physiol Nucl Med & PET, Rigshosp, DK-2100 Copenhagen, Denmark
[5] Copenhagen Univ Hosp, Dept Anesthesiol, Rigshosp, DK-2100 Copenhagen, Denmark
[6] Rigshosp Glostrup, Dept Anaesthesia Pain & Resp Support, Resp Ctr East, DK-2600 Glostrup, Denmark
[7] Copenhagen Univ Hosp, Dept Intens Care, Rigshosp, DK-2100 Copenhagen, Denmark
[8] Copenhagen Univ Hosp, Dept Orthopaed Surg, Spine Sect, Rigshosp, DK-2100 Copenhagen, Denmark