Children's exposure to environmental tobacco smoke: using diverse exposure metrics to document ethnic/racial differences.
Sexton K, Adgate JL, Church TR, Hecht SS, Ramachandran G, Greaves IA, Fredrickson AL, Ryan AD, Carmella SG, Geisser MS. Children's exposure to environmental tobacco smoke: using diverse exposure metrics to document ethnic/racial differences. Environ Health Perspect. 2004 Mar; 112(3):392-7.