Large-scale evidence for the effect of the COLIA1 Sp1 polymorphism on osteoporosis outcomes: the GENOMOS study by Ralston, S, Uitterlinden, A, Brandi, M, Balcells, S, Langdahl, B, Lips, P, Lorenc, R, Obermayer-Pietsch, B, Scollen, S, Bustamante, M, Husted, L, Carey, A, Diez-Perez, A, Dunning, A, Falchetti, A, Karczmarewicz, E, Kruk, M, Van Leeuwen, J, Van Meurs, J, Mangion, J, McGuigan, F, Mellibovsky, L, Del Monte, F, Pols, H, Reeve, J, Reid, D, Renner, W, Rivadeneira, F, Van Schoor, N, Sherlock, R, Ioannidis, J