Zhe Luo1, James B Fink2,3,4. 1. Deputy Director, Department of Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China. 2. Chief Science Officer, Aerogen Pharma Corp. San Mateo, CA, USA. 3. Adjunct Faculty, Graduate College Division of Health Sciences, Rush University, Chicago, IL, USA. 4. Visiting Professor, Department of Respiratory Care, Texas State University, Round Rock, TX, USA.