TY - JOUR T1 - Role of Diaphragm Ultrasound When NIV Fails in COPD Exacerbations JF - Respiratory Care SP - 1600 LP - 1602 DO - 10.4187/respcare.07523 VL - 64 IS - 12 AU - Hameeda Shaikh AU - Franco Laghi Y1 - 2019/12/01 UR - http://rc.rcjournal.com/content/64/12/1600.abstract N2 - ER -