1. Barker JD, Jr, de Carle DJ, Anuras S. Chronic excessive acetaminophen use and liver damage. Ann Intern Med. 1977;87:299–301.
2. Berger JM. Pain management. In: Silverstein JH, Rooke GA, Reves JG, editors. Geriatric anesthesiology. 2nd ed. New York, NY: Springer; 2007. pp. 308–21.
3. Bernabei R, Gambassi G, Lapane K, Landi F, Gatsonis C, Dunlop R, Lipsitz L, Steel K, Mor V. Management of pain in elderly patients with cancer. SAGE Study Group. Systematic Assessment of Geriatric Drug Use via Epidemiology. JAMA 1998;279:1877–82.
4. Berry SD, Miller RR. Falls: epidemiology, pathophysiology, and relationship to fracture. Curr Osteoporos Rep. 2008;6:149–54.
5. Boswell MV, Trescot AM, Datta S, Schultz DM, Hansen HC, Abdi S, Sehgal N, Shah RV, Singh V, Benyamin RM, Patel VB, Buenaventura RM, Colson JD, Cordner HJ, Epter RS, Jasper JF, Dunbar EE, Atluri SL, Bowman RC, Deer TR, Swicegood JR, Staats PS, Smith HS, Burton AW, Kloth DS, Giordano J, Manchikanti L. Interventional techniques: evidence-based practice guidelines in the management of chronic spinal pain. Pain Phys. 2007;10:7–111.