Correction

Following the publication of the article [1], we noticed that the Competing interests section was incomplete and should read as follows:

BD is President of ACTIF (Alliance Contre le Tabac en Île-de-France), a non-profit association which promotes smoking prevention and provided funding for this study. BD's involvement with the ACTIF is on a voluntary basis and he does not receive any financial compensation for his work. He was responsible for decisions to partially fund this study.