E-cigarette use and indoor air quality: methodological limitations: response to W. Schober et al.'s "use of electronic cigarettes (e-cigarettes) impairs indoor air quality and increases FeNO levels of e-cigarette consumers"
Int J Hyg Environ Health. 2014 Jul;217(6):705-6.
doi: 10.1016/j.ijheh.2014.02.001.
Epub 2014 Mar 3.