RT Book, Section A1 Woods, Ryan P. A1 Seamon, Jason A2 Stone, C. Keith A2 Humphries, Roger L. SR Print(0) ID 55749765 T1 Chapter 21. Arthritis & Back Pain T2 CURRENT Diagnosis & Treatment Emergency Medicine, 7e YR 2011 FD 2011 PB The McGraw-Hill Companies PP New York, NY SN 978-0-0-07-170107-5 LK accessemergencymedicine.mhmedical.com/content.aspx?aid=55749765 RD 2024/10/10 AB See Figure 21–1.