%0 Journal Article %A Oisin J O'Connell %T Is Extended-Release Guaifenesin No Better Than a Placebo? %D 2014 %R 10.4187/respcare.03319 %J Respiratory Care %P 788-789 %V 59 %N 5 %U https://rc.rcjournal.com/content/respcare/59/5/788.full.pdf