TY - JOUR T1 - Is Anything Absolute? JF - Respiratory Care SP - 1711 LP - 1711 DO - 10.4187/respcare.05333 VL - 61 IS - 12 AU - Brian K Walsh Y1 - 2016/12/01 UR - http://rc.rcjournal.com/content/61/12/1711.abstract N2 - ER -