1 Unidad de Terapia IntensivaHospital Civil Fray Antonio AlcaldeUniversidad de GuadalajaraGuadalajara, Jalisco, MéxicoGrupo Internacional de Ventilación Mecánica WeVentLatin American Intensive Care Network.
2 Department of Critical Care MedicineZhongshan HospitalFudan University, Shanghai, China.
3 Department of Cardiopulmonary SciencesDivision of Respiratory CareRush UniversityChicago, Illinois jie_li@rush.edu.