Patton C, Powell A, Patel A. Vitamin D in Orthopaedics. Journal of the American Academy of Orthopaedic Surgeons. 2012;20(3):123-129. doi:10.5435/jaaos-20-03-123.
American Geriatrics Society. AGS/BGS Clinical Practice Guideline: Prevention of falls in older persons. http://www.americangeriatrics.org/health_care_professionals/clinical_practice/clinical_guidelines_recommendations/2010/. 2010.