%0 Journal Article %A Pembe Keskinoglu %A Dilek Cimrin %A Gazanfer Aksakoglu %T Which cut-off level of urine cotinine:creatinine ratio (CCR) should be used to determine passive smoking prevalence in children in community based studies? %D 2007 %R 10.1136/tc.2007.021998 %J Tobacco Control %P 358-359 %V 16 %N 5 %U https://tobaccocontrol.bmj.com/content/tobaccocontrol/16/5/358.full.pdf