%0 Journal Article %A Robert W McCoy %A Brian W Carlin %T Product Performance Variability With Home Portable Oxygen Systems May Impact Patient Performance Outcomes: It May Be the Device, Not the Disease %D 2009 %J Respiratory Care %P 324-326 %V 54 %N 3 %U https://rc.rcjournal.com/content/respcare/54/3/324.full.pdf