RT Journal Article SR Electronic T1 Weak Cough Strength and Secretion Retention in Mechanically Ventilated Patients: Is There a Role for Cough-Assist Devices? JF Respiratory Care FD American Association for Respiratory Care SP 1583 OP 1584 DO 10.4187/respcare.06527 VO 63 IS 12 A1 Fernando S GuimarĂ£es A1 Ă‚ngelo RM Rocha YR 2018 UL http://rc.rcjournal.com/content/63/12/1583.abstract AB