RT Journal Article SR Electronic T1 Secondary Fibromyalgia JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 127 OP 129 DO 10.3899/jrheum.180611 VO 46 IS 2 A1 ROBERT M. BENNETT A1 RONALD FRIEND YR 2019 UL http://www.jrheum.org/content/46/2/127.abstract AB