[1] Univ Med Ctr Hamburg Eppendorf, Dept Intens Care Med, Martinistr 52, D-20246 Hamburg, Germany
[2] Asklepios Hosp Harburg, Dept Intens Care & Resp Med, Clin Airway Thorax & Resp Med, Hamburg, Germany
[3] Asklepios Hosp Barmbek, Weaningctr, Dept Pneumonol & Intens Care Med, Hamburg, Germany
[4] Asklepios Hosp St Georg, Dept Anaesthesiol Intens Care Emergency Med & Pai, Hamburg, Germany
[5] Asklepios Hosp Wandsbek, Dept Anaesthesiol Intens Care & Emergency Med, Hamburg, Germany
[6] Marien Hosp, Dept Cardiol Angiol & Intens Care Med, Hamburg, Germany
[7] Bundeswehr Hosp, Dept Interdisciplinary Intens Care Med, Hamburg, Germany
[8] Asklepios Hosp Altona, Dept Cardiol Pneumol & Intens Care Med, Hamburg, Germany
[9] Amalie Sieveking Hosp, Dept Anaesthesiol & Intens Care Med, Hamburg, Germany
[10] Albertinen Hosp, Dept Cardiol, Hamburg, Germany
[11] Agaples Diakonie Hosp Hamburg, Dept Internal Med, Hamburg, Germany
[12] Bethesda Hosp Bergedorf, Dept Internal Med, Hamburg, Germany
[13] Asklepios West Hosp Hamburg, Dept Anaesthesiol Intens Care & Emergency Med, Hamburg, Germany
[14] Asklepios Hosp Nord, Dept Anaesthesiol Intens Care Emergency Med & Pai, Hamburg, Germany
[15] Israelit Hosp, Dept Anaesthesiol & Intens Care Med, Hamburg, Germany