[1] Brigham & Womens Hosp, Channing Lab, Boston, MA 02115 USA
[2] Harvard Univ, Sch Med, Boston, MA 02115 USA
[3] Case Western Reserve Univ, Dept Epidemiol & Biostat, Cleveland, OH 44106 USA
[4] Univ Southampton, Southampton Gen Hosp, Human Genet Res Div, Southampton, Hants, England
[5] Johns Hopkins Univ, Baltimore, MD USA
[6] Chinese Acad Med Sci, Inst Basic Med Sci, Dept Mol Biol, Beijing 100730, Peoples R China
[7] John Radcliffe Hosp, Nuffield Dept Clin Med, Asthma Genet Grp, Oxford OX3 9DU, England
[8] Univ Freiburg, Childrens Hosp, D-7800 Freiburg, Germany
[9] Southampton Gen Hosp, Human Genet Res Div, Asthma Genet Grp, Southampton, Hants, England
[10] Univ Helsinki, Dept Med Genet, FIN-00014 Helsinki, Finland
[11] GSF, Natl Res Ctr Environm & Hlth, Inst Epidemiol, Neuherberg, Germany