TY - JOUR T1 - The First Necessity of Progress JF - Respiratory Care SP - 1613 LP - 1614 DO - 10.4187/respcare.05913 VL - 62 IS - 12 AU - Thomas D Berlin Y1 - 2017/12/01 UR - http://rc.rcjournal.com/content/62/12/1613.abstract N2 - ER -