1. Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA.
2. Respiratory Care Department, Massachusetts General Hospital and Harvard Medical School, Boston, MA.
3. Laboratório de Pneumologia LIM-09, Disciplina de Pneumologia, Heart Institute (InCor), Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, Sao Paulo, Brazil.
4. Division of Pediatric Critical Care, Department of Pediatrics, Massachusetts General Hospital for Children, Boston, MA.
5. Research and Education Institute, Hospital Sírio-Libanes, Sao Paulo, Brazil.