A longitudinal study of environmental tobacco smoke exposure in children: Parental self reports versus age dependent biomarkers
Carme Puig, Oscar Garcia-Algar, Toni Monleon, Roberta Pacifici, Piergiorgio Zuccaro, Jordi Sunyer, Cecilia Figueroa, Simona Pichini, and Oriol Vall
BMC Public Health. 2008; 8: 47. Published online 2008 February 6. doi: 10.1186/1471-2458-8-47.PMCID: PMC2276212