1. Postgraduate Program of Electrical Engineering Federal University of Minas Gerais Belo Horizonte Minas Gerais Brazil
2. Department of Anesthesia, Critical Care and Pain Medicine Massachusetts General Hospital Harvard Medical School Boston MA USA
3. Medical Intensive Care Unit Hôpital Henri Mondor Assistance Publique ‐ Hôpitaux de Paris Créteil France
4. Divisao de Pneumologia Instituto do Coracao; Faculdade de Medicina Universidade de Sao Paulo Sao Paulo Brazil