Bone density reduction in various measurement sites in men and women with osteoporotic fractures of spine and hip: the European quantitation of osteoporosis study. - Kröger, H; Lunt, M; Reeve, J; Dequeker, J; Adams, J; Birkenhager, J; Diaz Curiel, M; Felsenberg, D; Hyldstrup, L; Kotzki, P; Laval-Jeantet, A; Lips, P; et al. (Calcified tissue international, 1999)