[1] Norrtalje Hosp, Dept Anaesthesiol & Intens Care, Norrtalje, Sweden
[2] Karolinska Inst, Sodersjukhuset, Dept Clin Sci & Educ, Stockholm, Sweden
[3] Karolinska Inst, Danderyd Hosp, Dept Clin Sci, Stockholm, Sweden
[4] Norrtalje Hosp, Dept Psychiat, Norrtalje, Sweden
[5] Karolinska Inst, Dept Med, Ctr Resuscitat Sci, Stockholm, Sweden
[6] Karolinska Univ Hosp Solna, Ctr Mol Med, Stockholm, Sweden
[7] Karolinska Inst, Ctr Family Med, Dept Neurobiol Care Sci & Soc, Stockholm, Sweden
[8] Swedish Poisons Informat Ctr, Stockholm, Sweden