RT Journal Article SR Electronic T1 Bias in the Methodology: Sleep Quality Is Related to Worsening Knee Pain in Those With Widespread Pain JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 303 OP 303 DO 10.3899/jrheum.201165 VO 48 IS 2 A1 Chieh-Chun Yang A1 Po-Cheng Hung YR 2021 UL http://www.jrheum.org/content/48/2/303.1.abstract AB