Reference:
Freathy RM, Kazeem GR, Morris RW, Johnson PC, Paternoster L, Ebrahim S, Hattersley AT, Hill A, Hingorani AD, Holst C, Jefferis BJ, Kring SI, Mooser V, Padmanabhan S, Preisig M, Ring SM, Sattar N, Upton MN, Vollenweider P, Waeber G, Sørensen TI, Frayling TM, Watt G, Lawlor DA, Whincup PH, Tozzi F, Davey Smith G, Munafò M. Genetic variation at CHRNA5-CHRNA3-CHRNB4 interacts with smoking status to influence body mass index. International Journal of Epidemiology 2011;40(6): 1617-1628.