Hasserius, Ralph, Inga Redlund-Johnell, Dan Mellström, Christer Johansson, Bo E Nilsson, and Olof Johnell. 2001. “Vertebral Deformation in Urban Swedish Men and Women: Prevalence Based on 797 Subjects”. Acta Orthopaedica 72 (3):273-78. https://doi.org/10.1080/00016470152846619.