[1] 3M Co, Dept Med, St Paul, MN 55144 USA
[2] Johns Hopkins Bloomberg Sch Publ Hlth, Dept Epidemiol, Baltimore, MD USA
[3] Johns Hopkins Univ, George W Comstock Ctr Publ Hlth Res & Prevent, Baltimore, MD USA
[4] St Johns Mercy Med Ctr, Womens Ctr Hlth & Med, Prevent & Res Ctr, Baltimore, MD USA
[5] 3M Co, Environm Lab, St Paul, MN 55144 USA