RT Journal Article SR Electronic T1 Suprascapular nerve block reduced chronic shoulder pain and disability in degenerative disease or rheumatoid arthritis JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 50 OP 50 DO 10.1136/ebm.9.2.50 VO 9 IS 2 YR 2004 UL http://ebm.bmj.com/content/9/2/50.abstract AB