Find peer-reviewed, published research using the Inquisit Grading Chronic Pain Severity - Revised (GCPS-R)
Von Korff, M.; DeBar, L.L.; Krebs, E.E,c; Kerns, R.D.; Deyo, R.A; Keefe, F.J.(2020).
Graded chronic pain scale revised: mild, bothersome, and high-impact chronic pain.
PAIN,161,651-661.