Which ills of draft beer in the Czech Republic are the most common found the recent ppm factum survey conducted for Gambrinus

If you want to learn a little more, read the article published in the newspaper Metro. It presents some interesting research results. (Available in Czech language only.)
The representative research was conducted in June / July 2016. Data collection was organized among members of the online panel. It relies on a robust sample of 1,500 respondents.