Birth weight and systolic blood pressure in adolescence and adulthood: meta-regression analysis of sex- and age-specific results from 20 Nordic studies - Gamborg, M; Byberg, L; Rasmussen, F; Andersen, P K; Baker, J L; Bengtsson, C; Canoy, D; Droyvold, W; Eriksson, J G; Forsén, T; Gunnarsdottir, I; Järvelin, M R; Koupil, I; Lapidus, L; Nilsen, T I; Olsen, S F; Schack-Nielsen, L; Thorsdottir, I; Tuomainen, T P; Sorensen, T INordNet Study Group (Am J Epidemiol, 2007)