TY - GEN AU - Briggs,W C TI - "Double exposure": how real is it? SN - 0091-6765 PY - 1999///1013 KW - Environmental Exposure KW - analysis KW - Humans KW - Reference Values KW - Smoke KW - Tobacco Smoke Pollution KW - adverse effects N1 - Publication Type: Comment; Letter UR - https://doi.org/10.1289/ehp.107-1566484 ER -