Secondhand exposure to aerosol from electronic cigarettes: pilot study of assessment of tobacco-specific nitrosamine (NNAL) in urine Jose M. Martínez-Sánchez, Montse Ballbè, Raúl Pérez-Ortuño, Marcela Fu, Xisca Sureda, José A. Pascual, Armando Peruga, Esteve Fernández

Portuguese children's exposure to second-hand tobacco smoke in the family car Paulo D. Vitória, José Cunha Machado, Sofia B. Ravara, Ana Carolina Araújo, Catarina Samorinha, Henedina Antunes, Manuel Rosas, Elisardo Becoña, José Precioso

Opinions and practices regarding electronic cigarette use among Romanian high school students Lucia Maria Lotrean, Bianca Varga, Monica Popa, Cornel Radu Loghin, Milena Adina Man, Antigona Trofor