POStoperative INTELLiVENT-adaptive support VEntilation in cardiac surgery patients (POSITiVE) II—study protocol of a randomized clinical trial oleh Martin H. Bernardi, Dominique Bettex, Laura A. Buiteman–Kruizinga, Ashley de Bie, Matthias Hoffmann, Janine de Kleijn, Simon Corrado Serafini, Manon A. Molenaar, Frederique Paulus, Jasminka Peršec, Ary Serpa Neto, Reto Schuepbach, Paolo Severgnini, Andrej Šribar, Marcus J. Schultz, Edda Tschernko, for the POSITiVE II–investigators