[1] Charite Univ Med Berlin, Dept Anaesthesiol & Operat Intens Care Med CCM, CVK, Augustenburger Pl 1, D-13353 Berlin, Germany
[2] Humboldt Univ, Freie Univ Berlin, Berlin, Germany
[3] Berlin Inst Hlth, Campus Virchow Klinikum, Augustenburger Pl 1, D-13353 Berlin, Germany
[4] Charite Univ Med Berlin, Dept Paediat & Neurol CVK, Berlin, Germany
[5] Charite Univ Med Berlin, Inst Med Biometry, Sostana GmbH, Berlin, Germany