David W ChangDavid W. Chang, EdD, RRT, is professor of cardiorespiratory care at the University of South Alabama in Mobile, Alabama. Over the years, he has served in different capacities in the American Association for Respiratory Care, Commission on Accreditatio for Respiratory Care, and National Boardfor Respiratory Care. Dr. Chang has also authored Clinical Application of Mechanical Ventilation and co-authored Respiratory Critical Care. Read More Read Less