[1] Univ Saarland, Univ Med Ctr, Dept Anesthesiol Intens Care Med & Pain Med, Homburg, Germany
[2] Univ Saarland, Univ Med Ctr, Inst Med Biometry Epidemiol & Med Informat, Homburg, Germany
[3] Orthoped Univ, Dept Anesthesiol Intens Care & Pain Med, Frankfurt, Germany
[4] Univ Marburg, Dept Anesthesiol & Intens Care Therapy, Marburg, Germany
[5] Acad Hosp Solingen, Dept Anesthesia Intens & Palliat Care Med, Solingen, Germany
[6] Friederikenstift Hannover, Dept Anesthesiol Intens Care & Pain Med, Hannover, Germany
[7] HELIOS Hosp, Dept Intens Care Med, Bad Saarow Pieskow, Germany
[8] HELIOS Hosp, Dept Anesthesiol Intens Care & Pain Therapy, Erfurt, Germany
[9] Univ & Rehabil Clin, Dept Anesthesioly Intens Care & Pain Therapy, Ulm, Germany
[10] Charite, ChariteCampus Virchow Klinikum, Dept Anesthesiol & Operat Intens Care Med, D-13353 Berlin, Germany
[11] Charite, D-13353 Berlin, Germany