Different wording of the Patient Global Visual Analogue Scale (PG-VAS) affects rheumatoid arthritis patients' scoring and the overall Disease Activity Score (DAS28): a cross-sectional study.
Musculoskeletal Care. 2013 Dec;11(4):229-37. doi: 10.1002/msc.1046. Epub 2013 Feb 4.
Musculoskeletal Care. 2013.
PMID: 23378146