1. Department of Surgical Sciences, Section of Anaesthesiology and Critical Care, Uppsala University, Uppsala, Sweden;
2. Cardio-Pulmonary Department, Pulmonary Divison, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil;
3. Instituto de Investigaciones Sanitarias ISS-FJD, Fundación Jiménez Díaz, Madrid, Spain, Centro de Investigación Biomédica en Red, Enfermedades Respiratorias;
4. Research and Education Institute, Hospital Sírio Libanês, São Paulo, Brazil; and
5. Department of Medical Sciences, Clinical Physiology, Uppsala University, Uppsala, Sweden