Haddock, Lillian, et al. “The Prevalence of Vertebral Fractures in San Juan, Puerto Rico: A Population-Based Study Among Females Aged 50 Years and Over”. Puerto Rico Health Sciences Journal, vol. 29, no. 4, Nov. 2010, https://prhsj.rcm.upr.edu/index.php/prhsj/article/view/545.