Nugent, K., and H. Edriss. “Official American Thoracic Society/American College of Chest Physicians Clinical Practice Guideline: Liberation from Mechanical Ventilation in Critically Ill Adults”. The Southwest Respiratory and Critical Care Chronicles, Vol. 5, no. 19, May 2017, pp. 1-3, doi:10.12746/swrccc.v5i19.390.