Novel childhood asthma genes interact with in utero and early-life tobacco smoke exposure. by Scholtens, S, Postma, D, Moffatt, M, Panasevich, S, Granell, R, Henderson, A, Melén, E, Nyberg, F, Pershagen, G, Jarvis, D, Ramasamy, A, Wjst, M, Svanes, C, Bouzigon, E, Demenais, F, Kauffmann, F, Siroux, V, von Mutius, E, Ege, M, Braun-Fahrländer, C, Genuneit, J, Brunekreef, B, Smit, H, Wijga, A, Kerkhof, M