TY - JOUR T1 - The Value of Conducting Laboratory Investigations on Airway Clearance Devices JF - Respiratory Care SP - 311 LP - 313 VL - 53 IS - 3 AU - Teresa A Volsko Y1 - 2008/03/01 UR - http://rc.rcjournal.com/content/53/3/311.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -