RT Journal Article SR Electronic T1 A clinical prediction guide predicted progression to rheumatoid arthritis in undifferentiated arthritis JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 154 OP 154 DO 10.1136/ebm.12.5.154 VO 12 IS 5 YR 2007 UL http://ebm.bmj.com/content/12/5/154.abstract AB