Obesity during childhood is associated with higher cancer mortality rate during adulthood: the i3C Consortium by Nuotio, J, Laitinen, TT, Sinaiko, AR, Woo, JG, Urbina, EM, Jacobs, DR, Steinberger, J, Prineas, RJ, Sabin, MA, Burgner, DP, Minn, H, Burns, TL, Bazzano, LA, Venn, AJ, Viikari, JSA, Hutri-Kähönen, N, Daniels, SR, Raitakari, OT, Magnussen, CG, Juonala, M, Dwyer, T